Hmmm... Kinect can't do this with any kind of precision from the couch. The camera is too wide-angle and it can't do the selective light method. But this is completely off topic.
SCE also have recent patents indicating they are working on far-field eye tracking. They seem to be experimenting with three different methods: selective, dynamic position, and visible lights. But none of these are really applicable to VR, they are far-field which arguably is the most difficult.
Gaze tracking variations using selective illumination
http://www.freshpatents.com/-dt20150326ptan20150085097.php
Gaze tracking variations using dynamic lighting position
http://www.freshpatents.com/-dt20150326ptan20150085250.php
Gaze tracking variations using visible lights or dots
http://www.freshpatents.com/-dt20150326ptan20150085251.php
OTOH, with VR they can use many many shortcuts, and very low-cost addition, possibly even using the light from the screen as illumination.
SCE also have recent patents indicating they are working on far-field eye tracking. They seem to be experimenting with three different methods: selective, dynamic position, and visible lights. But none of these are really applicable to VR, they are far-field which arguably is the most difficult.
Gaze tracking variations using selective illumination
http://www.freshpatents.com/-dt20150326ptan20150085097.php
Gaze tracking variations using dynamic lighting position
http://www.freshpatents.com/-dt20150326ptan20150085250.php
Gaze tracking variations using visible lights or dots
http://www.freshpatents.com/-dt20150326ptan20150085251.php
OTOH, with VR they can use many many shortcuts, and very low-cost addition, possibly even using the light from the screen as illumination.