My guess is that if this is the next platform release for the Xbox that it will work about as well as Nintendo's Wii does now. That is, it does work, but not quite as well as you would like it to.
I envisioned the next version of Nintendo's Wii as one that would involve multiple sensors placed upon your body at your joints as well as a pressure sensitive mat that would be placed out for you to stand and jump around upon as well.
Microsoft seems to be trying to skip a generation of technology that I just described. Kudos to them if they can pull it off, but I have my doubts. As I stated before, it will probably work as well, proportionately, as the Wii does now. At least it better if they want it to be at all marketable.
It certainly is a skip in interactive technology that I wasn't expecting.
Are there other areas where such technology is being used in a non-retail basis that is working well?