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From watching vids of the conference it seems obvious that Kinect has its uses, but for the games shown it seemed obvious that while the control input is great, it does have its limitations already mentioned. The Star Wars game is on-rails and the Forza game didn't allow you to control your acceleration and breaking...
I think what people see from this video is pretty much what was already stated in this thread. It does seem to be a pretty shallow experience. I doubt anyone will really give the game that much thought when it comes to its release and reviewers blast it for various reasons.
Of course, the people who have the spirit of the Star Wars kid within them won't care either way and will love the game.