Why Head Tracking?

[Artist]

Originally Posted by sigur_ros

Naturalpoint have 0 TrackIR patents.

http://naturalpointofview.blogspot.c...sive_patenting

...seems to build a convincing case (makes me feel silly, concerning my earlier post). I wonder who it is. Does anyone know?

Apart from that, I'd be interested in a poll:

What kind of POV-system do you use:
[ ] FreeTrack
[ ] Track IR
[ ] Other Head-Movement-Based-Tracking System (???)
[ ] Fingers (Coolie Hat or similar)
[ ] Mouse

Any suggestions?