IR markers would seem to hint at reliability issues of tracking. Presumably one could reply "algorithms are still being developed and fine tuned". But if it's

IR markers would seem to hint at reliability issues of tracking. Presumably one could reply "algorithms are still being developed and fine tuned". But if it's not reliable, then I can't see how it would be usable by the mass market. People don't generally respond well to half of their visual world desyncing from their physical body, even if it's 1:1000 seconds.