Is it though? My understanding was that TrackIR was nothing more than an IR webcam surrounded by IR LEDs, that also served as a dongle for the freely downloadab

Is it though? My understanding was that TrackIR was nothing more than an IR webcam surrounded by IR LEDs, that also served as a dongle for the freely downloadable "driver" which contained all the tracking code. With OpenTrack, a webcam with the IR filter removed, and a 3d-printed clip, I get results indistinguishable from TrackIR. A system that uses a visual light camera and no reflector clip will inevitably be slower, as it is a much harder computer vision task. But I don't think hardware acceleration comes into it anywhere.