Nice marketing video, but I'd like to see a full fledged use of the technology. Personally, I'd like to see this tech on next generation, not on this one. Specially with the advent of 3D gaming.
Oh, and this video made me remember things like "I'll look stupid waving my arms while playing the Wii" and "I like to play sitting comfortably on my couch"... and all of sudden, waving your arms AND your legs is now cool.