All of those things are nice, and definitely make the PC experience better. However, none of them are required to play Skyrim at acceptable/good performance. In fact, buying those things will end up costing you an extra $200-300(maybe more) dollars, that could easily be spent on a better video card. Sure, loading times and hitching svck, but these are things that can be dealt with via design. If the design of the technological aspects of the game don't take advantage of the added devices, you won't be seeing much of a difference. For instance, in Oblivion, even with an SSD, you'll get hitching. It might not be as noticeable, but it's still occurring.
Then there's the 32bit application issue (which skyrim will no doubt be 32bit) where the program itself cannot utilize more than 2GB of system memory.
My example was only that...an example. And not to be taken literally (mostly because of that nasty 32-bit limitation, although nobody has discarted a 64-bit version). But the extra bandwitch will *always* be useful, like it or not, even more when loading large textures (which Skyrim will have, if not in Vanilla, then at some time or another). The HDD's have been a system hog for quite some time (that's the very reason why RAM exists), so
anything that would remove that bottleneck is important to consider when buying a new rig.
My point? All of those extras are nice, but completely unneeded when it comes to this game. You're spending money on enthusiast parts that the game is not being designed around. They will make a difference, but the difference, in my own opinion, does not warrant the huge price difference.
While nice programming would indeed improve loading times, as I said in many cases there's nothing you can do to improve them simply via programming (loading hi-res textures, enormous detailed terrain, etc...all of that takes raw power and bandwitch), so an improvement over the mass storage media is, logically and by definition, http://www.youtube.com/watch?v=6jsHpNkDQn0.
It's for enthusiasts? Devices like RevoDrive maybe are indeed, but SSD's are getting faster, more reliable and cheaper at lightspeed.