I see where your coming from but in all honesty the jump in quality to what you would get from a mid specced gaming rig or xbox 360 (2nd hand £100 probably less) just isnt at the moment worth the £1000 plus you would have to invest to get it.
Its all good and well Nvidia and Amd saying our latest gfx card has 4X the power of the latest games console but whats the point if after the investment your getting the same old game that a console that costs many times less is giving you granted you will probably be able to play at a higher resolution and get more fps but at what price?
you named 3 games there to my mind only skyrim really needs the heft its just not enough for me, but i of course understand it is for some as i have been one of those people.
I really think what the pc gaming format needs is a killer app something with eyecandy that just cant be had anywhere else,unfortunately i cant see it happening its all gone multiformat with a general mantra of cater for the lowest common denominator. This i also understand as a game like that would cost a hell of a lot to produce and you would just not recoup that money with a pc exclusive game, alas this is where we stand but of course thats just my opinion