I didn't think I would care about face tracking, but Star Citizen uses a Face over IP system and man it really enrichens the online experience. You can communicate a lot more subtlety with it.
It also has the benefit of necessarily head tracking as well, so you can also do TrackIR style head tracking which again adds a lot to the experience to be able to move your view around independant of the mouse and in ways a mouse can't move.
It also has the benefit of necessarily head tracking as well, so you can also do TrackIR style head tracking which again adds a lot to the experience to be able to move your view around independant of the mouse and in ways a mouse can't move.