Looks carefully .. id u'd be following the developement of crysis a bit carefully , u'd notice that the video is created by simply merging two videos , one released recently , and one released a long time back .. until the developers release a direct comparison themselves , i don't think it'd be wise to jump into conclusions .. albeit the dx10 will look better , but the developers have said that crysis (like Far Cry) will a few years ahead for the current gen. of hardware to catch up ,, and that they cannot assure than the latest high end hardware can run it on maxed settings . But yes , the game engine will still be scalable , and u'd be able to play with even a 6600 ..
"The alpha is done and the beta demo is not a million miles off – it’s definitely coming though. The game is in really great shape and there are a number of things that work extremely well
Everything you’ve seen in the videos is real, and there is a whole bunch more stuff still to come that you’ve not seen yet. Let me just say that it’s a really exciting title and I wish I could say more!â€