Video of Natal in action at Tokyo Game Show.
1. I have little doubt that the presenter in the sunglasses will be seen on many .gif files in the near future.
2. Not sure why Microsoft showed this technology so soon. There's a lot of lag between the motion and what happens on the screen, especially when compared to the Wii. They may be able to get that fix since it's not released for a year or more, but bad first impressions can kill a product if you show it too early.