A lot of people are referring here to the object pop-in. I put all the settings to "high" and didn't have any pop-in, but when I dropped them to "medium" there was lots of pop-in. One of the options probably deals with it; just put that one to high and then leave everything else where it is. It's really a trade-off on the power of the system for framerate, not something you're forced into. The game is simply designed to be played as we've been seeing the videos, on the best available hardware, not on even on a prev-gen beefy video card like a 7900GTX.