Also 6dof tracking with hand gesture tracking under 10ms is still a challenge. I think it's possible but needs serious hardware advancements.
I love my bridge though. No hanging cables is definitely a good thing
http://www.roadtovr.com/wp-content/uploads/2016/10/valve-vr-...
IMO we need to go through at least two resolution quadruplings on the Vive to get it to be crisp enough for the screen-dooring to not be noticeable.
Once Vive-level VR comes down to wireless/portable size and down in cost to the $300 range it's going to be MASSIVE. Maybe the first generation ("until we get 16K 120fps headsets") will not appeal to productivity or hardcore gaming buffs, but 100 million Wiis were sold, and there was nothing technically impressive about that thing.
VR isn't going to be popular until we have 8K or 16K headsets doing 120fps, and then we have to deal with the fact that it removes you from your environment.
The first generation of VR died off because they couldn't figure out how to solve the product liability issues. That problem still exists, which is why VR isn't going to be usable and is a dead-end.