Sony needs to do anything? Its a game thats on both platforms, and that game isn't better looking that Uncharted 2 (In my opinion) thus I don't feel like they need to do anything.
But... for those who think Crysis 2 is a "tad" better than Un2 (Which I doubt are too many...) Uncharted 3 is coming soon XD. They can't really do anything but improve. EVEN IF something happend, and the game looks JUST like Uncharted 2, its still fucking amazing LOL.