No idea about the latency of hdmi cables, but it would be from
consoles to projector = for console games
From pc to projector = for pc games that have no vr support
People use projectors to play games, so i guess if there is any latency, is acceptable.
For waking in games at this point i have found more than 1 working solution. So i think i am more or less good with that.
The device you suggested it probably would be interesting for crouch and jump in games, to add to the methods I have now for walking in games, though after icubex finishes with their software optimizations , i think that that would be included in their device (1 device only).
I need to figure out what solution your suggested hardware can give me with head tracking.
Wiimote, or chinetic, is limited by the camera. If you are not facing properly the canera, there is an issue.
Trackir, if i am not mistaken runs on its own software hence the compatibility with games is dependent from that.
Need to look at facetracknoir.