The point I was making is that Bethesda are famous for putting all kinds of references and easter eggs into their games. One such example is the design of the bomb we see in Megaton, which is modelled on the "fat man" that was dropped on Nagasaki. Another one, connected with Fallout 4, is the release date which just happens to be the birthday of the US Marine Corps. This ties in with the military background of our protagonist.

Thinking about this from a design perspective, you would actually expect Bethesda to make any in-game dates significant in some way. Just like, for example, the main character in the Matrix series being called Neo, a word meaning "new", which also happens to be an anagram of the word "one". Bringing this back to Fallout 4, the relevance of Armitage and Harkness, for example, is the fact that were the first known androids built by the Institute. The Institute are very significant in the Commonwealth, the setting for Fallout 4. This same reasoning is also applicable to the vertibird reference, as we have seen several of them during gameplay. But why would the 200 year gap regarding both of these be relevant in any way? The simplest answer would be that Bethesda's first venture into the fallout universe was set exactly 200 years after the great war.

This may all seem a little cryptic, but I do think that even if these are not the dates the developers have used, the actual dates will most certainly have strong connections to other dates and events in the fallout universe.

EDIT: the dates from my timeline as I have clarified them here would actually support the elements of concept art as shown in this thread. The two main themes being the idea of a more expansive territory for the Institute (and even the possible HQ of the Railroad) as well as the inclusion of factions from Bethesda's previous games suggesting a start date some time after the events of NV.

Cats confirmed, see https://youtu.be/D5esyZPt5Jo?t=4m21s part of the showcase video at 4:21, top right of screen. Don't know what implications this would have on gameplay. Perhaps some kind of new enemy?

if he did let slip 235 year old man, perhaps that means that we are not playing an android? otherwise his hint would be a red herring to throw us off the scent of the true android plot? I doubt we are just because i hope the full life like replica's are rare. I assumed as much before since the creator left his safety and protection to venture out after his creation.

Lots of good ideas here though, a whole lot. I cannot wait to see how this all turns out and if it is anything like f3 and new vegas, should be good for another 5 years of gaming(still playing vegas all the time. Have to go back to f3 again. It was one of my first fallout games and maybe some clues or hints may come to me while exploring the wasteland again.

I have to agree that there appear to be a huge number of possible power armor variants in the concept art. And it would actually be very interesting to see what the devs would do with something like tesla armor if the enclave do show up.

Also, I really like the idea of fighting alongside CWBOS if that opens up as a tactical option.

Special ammunition for the Junk Jet?

I just posted two more links in the OP showing what looks like a small submersible and also a giant squid! Could mean we have a number of large underwater areas to explore...

EDIT: I have added my thoughts as to the possible origins of the submersible http://www.gamesas.com/topic/1523172-is-vault-111-built-like-a-submarine/page-2 (third post from top of page) - I think it's actually linked to vault 111

I made this a while back

http://www.gamesas.com/topic/1521914-info-extracted-from-artwork-slideshow/

Well spotted, so at least I know I wasn't imagining it! An interesting development (which I have also noted in my submarine thread) is a very strong link to a possible Captain Nemo easter egg. Look at the hatch shown in http://www.uncleodiescollectibles.com/img_lib/01%20Captain%20Nemo%20Submarine%20Hatch%2001%209-6-4.jpg which is actually a prop from a 70's TV show called "The Adventures of Captain Nemo". Now compare it to the red valve we see above the vault in post war shots. Puts the submersible and giant squid into a slightly different light!

EDIT: additional info added to OP

The most important concept arts aren't the ones we've seen ingame...but the one's we haven't. When you compare the concept art to some of the live footage, they're almost identical. For example, there is a concept art with the saloon where we saw the vault dweller fighting with his laser musket and if you compare that scene to the concept art scene...you can see almost every chip in the wood is identical. So, I really think all the concept arts we've yet to see in game will take form almost exactly as the concept art shows. And I don't think bethesda would show us concept art that doesn't represent the game.

This makes this thread the most important thread on the forums for theorizing because the concept art footage shows a lot for us to decipher.

Meh,looking at the concept art from FO3 and NV i wouldn't say that.But then again,I too noticed that they're keeping the in game models true to what's in the concept art with FO4.

or into the past.

like, that's actually the protagonist standing there in post-war wasteland, but operating some device that replays some kind of AR-holo of what happened in that spot pre-war

(would be a nice device to have anyway

Another kitten pic upper right hand corner at 1:26 in the https://www.youtube.com/watch?v=1t_YHgo_HN4 presentation video or at 4:26 in the video that you've linked! Purrrrrr!

Another item of note from the concept art plus the building a house section at 4:30 in your video link and at 23:33 in your video link there are the same pictures of a light house. The first being concept art (lower left hand corner) the second being an icon choice (3rd one) when creating a building in game!

I wonder how much of the concept art they showed is actually in the game, or if alot of it is just to show the ideas they were considering.

I think they would rather avoid intentionally setting people up for disappointment if they can help it, and so I'm quite sure that all of the concept art shown is actually referencing in-game content. At the other end of the spectrum, there's probably a whole lot of content we haven't seen yet in any form.

I agree the concept art shown is probably pretty relevant to whats in Fallout 4, there was undoubtably a lot of concept art that never made it into the game but there is really no need to put that into their E3 presentation.

What I find interesting about the concept art is what is missing, who is the BOS, Minutemen and Protagonist fighting......where is the art work for the big bad.

And surely this would suggest that it would be something, or at least someone, that we have never seen before. The only really viable option I can think of is a new 'production line' coming out of the Institute.

EDIT: I think this is definitely connected to the 'Synth Assaulter' and 'Synth Strider' shown towards the end of the E3 demo.

https://youtu.be/D5esyZPt5Jo?t=268 and https://youtu.be/D5esyZPt5Jo?t=268 I suspect is basically the same "concept" but evolved, the robot in the first shot to me looks like hes pulling a engen block of some kind (a portable generator?) that may be powering him, in the second it looks like a Protectron with a cable leading to a generator

The first one is really interesting. It looks like whoever lives in the house in the background is using recovered android tech as some kind of scarecrow. The second one (the link isn't working, but it's actually at 4:32 in the video) is the same shot we see with the brahmin from the trailer. If you look closely at the shot in the trailer, you can see somebody turning soil or something similar which suggests that the Protectron is being used perhaps to actively guard their plot of land.

I've actually noticed as well that there are quite a few buildings shown that look like they could be player houses. Do you think that we will have 'pre-built' houses that we can then customise, or just a 'start from scratch' approach like Hearthfire? Also, I'm hoping that any houses we find or build will be free once we find them, rather than having to buy houses or plots of land.

There's also concept for aliens, clearly, as well as a Mole Rat Queen. That'll probably be an enemy since there is also a Mirelurk Queen.

I'm really liking the diversity in all of the enemies we have seen so far. It makes you wonder what else Bethesda might have up their sleeve.

also at 4:53 to the left you can also see a mole rat queen and an alien trooper in full enviro suit.

from a zoological point of view, i don't actually think there's anything like "queens" for mammals. post-nuke or not.

Because https://en.wikipedia.org/wiki/Eusociality#In_mammals likes to mess with our classifications.