With DX11 and new improved physics engine, I'm hoping that the developers would be making TES5 to allow main-stream level machines to handle it.
To my standard, Oblivion was pretty good. The graphic was solid, and the overall game was pretty good. Fallout3 showed slightly better graphic and physics while playing marginally smoother.
The game was announced, so I'm guessing they're nearly done with the basic construction of the game. I hope I'm not too late here to suggest something like this. At least, if they can add simplified polygons and lesser texture at the last minute, they'd have my thanks.
Today, I have a machine with 3.0 quad with GTS450. Most people in average have 2.0 dual with Intel HD. I am hoping that I wouldn't have to buy a new one when TES5 hits town. I think it will really help with the sales.