well its the best vr you can get with current hardware:
the key for inmersion is keeping the proportions, you really cheat your brain into thinking youre really there
the key to look at any picture, game or whatever with realistic proportion is:
if you have a fov of 30º the screen must have an angular size of 30º
with johny lee system youll always feel breath taking realistic proportions at whatever distance from the screen
now if you want to use a wide view with lees system implemented i suppose could be telling the software that for every 2º of the virtual world it renders on the screen 1º
doing it witha webcam is a matter of using face recognitions software
they could ask casinos
faces of blackjack counters are kept on black lists and detected via the eye in the sky as soon as the counter puts step on the casino