Gamespot just did a video of direct comparisons of PC version on Medium and High next to the 360 version. The 360 version looks slightly better than the PC running on medium, but obviously not as good as high. Considering the console is 6 years old this year, that is an amazing feat. From these videos the game is looking like it'll be one of the if not the best looking 360 game as of yet. And the framerate seems to hold up across the board.
This is just such a tease! Can't wait for the 17th!