Last year I was able to play with one for a couple of hours. The most impressive and exciting part for me was that it wasn't bad. I don't know about others, but I had expected an unpolished feel, and to be continuing to say "oh this will be great when they ______". The latency is much lower (comparable to modern VR) than I expected; the occlusion of virtual objects by real ones works surprisingly well, even with weird shapes; even the gesture recognition worked well. My overall takeaway was that it was much further along than expected. It was genuinely fun to play with, and I felt able to walk around my office while wearing it. Obviously the FOV is an issue to be worked on, but overall I was just impressed. I wish I still had one I could play with.