Many people did. Some one even took time to compile a complete weapon list: http://imgur.com/a/Y4Tga
Watching an anolysis of the crafting part of E3 reveal, you need the local Leader Perk Rank 2 to start building a settlement.
Edit: Need Rank 3 to make a trader stand
also when they show the pc making a dog house, there was what looked like a crib as a craftable item.
Edit 2: You need Rank 1 of the Hacker perk to create a terminal.
Edit 3: The science perk rank 1 is needed to craft laser turrets
Edit 4: https://www.youtube.com/watch?v=NW2LJdRikL0 the link to the video...
You can access holotapes with them, what those entail is beyond me. One terminal can be used as a hub of sorts, to access turret systems, and lighting.... Perhaps we may even be able to make our own entries in them. Keep a wasteland journal of sorts, of our characters adventures and story.