Actually, Skyrim won't be too difficult to run believe it or not, it'll actaully be easier to run than both Rage and Arkham City, because of the tech they are using to port it to PC.
It's being designed specifically for the 360, then being ported to the PC and PS3. This means that any mid-level gaming computer will be able to run it on high enough settings to make it definitely on par with the 360 version, and probably even better than that.
It's pretty crazy how beautiful they made the game, having it being designed for 360.
"You lack the requisite spine and testicular fortitude to study under me"