2 point head traking on the wiimote is very limited for depth perception - it is incapable of determining if you turned you head sideways (which gives the appearance of the 2 points becomming closer) or actually moved forwards or-backwards (which also gives the same effect ), - the software would have to make a guess - it's a cheap solution and not even in the same league as real camera based head tracking systems >>>.
Real camera based head tracking can do good Six Axis tracking of head position - take a look at Toshibas work with their digital mirror software running on the Cell this is remarkable. The PS3's Cell processor is over 3* faster than that used by toshiba. PS3 could do this with processing power to spare !.
PS3 Eye is just a high speed camera but with the CELL it's capable of far more than just taking photos or video clips.
PS3 number 1 fan
