I think as the cost of entry decreases, it will become more widespread. I see memory/bandwidth as the current limiting factor if you are watching on your phone since those files for VR are HUGE. I think it is a good investment for the future since porn always tends to innovate (i.e. online payments)
I think that's the big factor as high quality VR sets are still pretty pricey for someone to get just for porn. Also as VR helmets/masks become slimmer and less bulky there'll be a greater desire to try it out (no one wants to wear 5 pounds of gear for a quick jerk session).
Despite "Virtual Reality" being a thing people have heard of for 40+ years, the technology is still in it's infancy. Give it 5 years and it will be more affordable, more compact, and data limits on mobile phones will be unlimited for cheap (just like what happened to text messaging, which is now almost always Unlimited).
VR porn is excellent, been into it since 2017. I think the industry is booming, there are regular releases in the paid sites. There's a lack of free VR porn though
Like many new things, yeah its a dud. VR is really cheap but if you're gonna go full VR porn then you'd want those fancy toys that simulate the motions of what happens in it. Those are super expensive and for something that I'd probably do once a week it ain't worth it. Maybe when theres a cheaper option it'll pick up