For those who suscpet it's a fake: it's the real deal. The patent application can be seen here
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220080261693%22.PGNR.&OS=DN/20080261693&RS=DN/20080261693
The pics will explain better:
Still reading. There are more pics too. As per that rumour, it uses PSEye and ultrasonic stuff for full tracking (in tandem also with body/head/face tracking).
All hail the KING, Andrespetmonkey