*must...control...laughter...*
Well, I found the answer from google, and found that this question has been asked many times, so I'm not the only one. And if there are emulators on PC, maybe there are emulators for XBox as well.
I have no experience using Xbox, but I'm at sister's house, and they have Xbox, on which my sister's little kids play volleyball with Kinect, so I thought maybe I'd try Crysis on it. Those who have both Xbox and PC, are the graphics better or worse on Xbox rather than playing it on PC with say HD 7850?