From what I have seen, he is targeting pro users. I don't see why it
couldn't work - you can assemble a similar system from off-the-shelf
components already. It won't be cheap, though (mainly the tracking and
the computers for each HMD).
I am not quite sure whether he streams video to the HMDs or whether it
is more a backpack type solution - no video nor pictures I have seen so
far were showing an actual working setup.
J.