i mean we have only had one fatality, but one is arguably too many. And i cant imagine how many near misses there have been. i have had 2. I wonder the cost of such a system. would manufacturers be willing to add that on. would people pay for it.
could it be done through a kinect like device monitoring depth changes in the room while masking out the player. It would have a blind spot where player obstructs camera unless it was centrally mounted to ceiling. or a cheap IR sensor the feed of which can be read for additional moving hot objects beside player.
As terrible as this sounds, i think we are in a situation as if car companies had not invented seat belts because not enough people had died yet. I think as VR use increases and accidents inevitably follow headset manufacturers will be pressed into finding a cheap solution, but wont go far out of their way to do so until then.
Apple may deal with it given their resources and position as an ultra high end product in any consumer field they enter.