i saw a vid a while ago showing differences in some scenes from DX9 to 10, and it was huge, but i could see like no diff in those pics b4 that you showed, hah, but i guess that might be cause it wasnt really dx10.
but yea, massive differences in smoke effects, fire etc, also when you're in the forest it is a whole lot more dense and organic lookin, idk, just seem to remember those things.
we'll see!