Child of Eden, the one Kinect game that I really wanted to play at PAX 10, was a no show this year. To make up for that, fate tossed Kung Fu Live! my way, and I loved it. It's basically old-school Mortal Kombat but with better graphics and full-body motion controls.
I was especially shocked by how robust single-player mode was, and how many special moves are in the game. There are even boss fights. If Kung Fu Live! is Sony's way of relaunching the PlayStation Eye in order to go head to head with Kinect, then I think they're on the right track.