but that only measured movement
Natal measures movement, colour, depth, speed, can do live motion capture, facial recognition, multiple users, gestures, work in the dark, and wash your dishes.

I'm still going to call shenanigans on this one as it's Lionhead and you can rarely trust their demos, but the technology behind this is way beyond the 2002 eye-toy, which despite being derided as a gimmick sold millions.