This is only my opinion, but I believe the video/gif which has been circulating of the guy Kintected to Star Wars from Sunday night was, indeed, faked. He was just copying what he saw on the screen. I think this is the case because the exact same video was shown during Monday's conference. *However* I do think Kinect is real, and works, as all of the demos at Monday's conference appeared believable, and there were even a few unresponsive moments which you'd expect from any advanced technology.
As a side note, I'm a massive Nintendo fanboy, I've never even considered buying a console from the "other two", but after watching the conference last night, I'm very *very* tempted to buy a 360 for a nice voice & gesture controlled HD media centre! Well done Microsoft (can't believe I just said that!)