There were already several threads about this on here in the last day or two, and this post adds nothing to the conversation.
It's vaporware, it's promising something that's been promised before, we've never seen this idea work before, the technology will almost certainly be very faulty. To top it off, Microsoft sucks at game design, and developers are notoriously slow for taking hold of new ideas. They can't do what Nintendo did with the Wii because Nintendo provided both hardware and software, and Microsoft can't do that.
If it was vaporware, they wouldn't have spent all that money on the Israeli startup they got the technology from. They also had working games at E3, admittedly played from the age. Nobody AFAIK has attempted 3D motion detection on a console before, things like EyeToy are 2D only.