Also very cool to see such a sweeping overview of the ongoing engineering challenges we face.
It's not even a matter of engineering the solutions; we have yet to fully understand so many of the problems, and we'll need years (decades?) of research before beginning to think about some of the solutions. That's not to say it can't be an overall positive technology/experience in the meantime, but it'll likely be many years before it's free of certain side effects (e.g., nausea, discomfort) that bother people.
While the road toward "perfect" VR is just getting started, these first-gen consumer sets have crossed the starting line, and are qualitatively different from earlier VR experiences.
(BTW, while comfort isn't a totally solved problem, for 1:1 motion, these sets (and PSVR) are pretty good and I think for most people, won't make them sick.)
Watch this channel at 1pm for John Carmack's lecture.
Carmack's: http://www.twitch.tv/oculus/v/17538854?t=3h31m10s
These are the good old times of VR. Cherish them.