Not sure about Hentai, but I'm sure 360 degree POV "adult" interactive videos may be getting some playback.
I hope it becomes a big thing. I tried one out a couple months ago but I wasn't thrilled with the game I was going to use it for (Project Cars).
Well, the new consumer models have a much higher resolution in the eyes and better hardware. So, should be a lot better than the older developer models.