For proof, look no further than John Carmack, who left id Software for Oculus because he was just that excited about the possibilities of VR, and who is now jumping off the VR ship before it sinks and takes him down with it. As reported by The Verge:
It was unclear whether the problem with no solution in sight referred to VR, or AI, or both.
People, if John freaking Carmack can't figure out what VR is good for, or how to convince skeptical consumers to buy in, then VR is probably doomed. Palmer Luckey, who founded Oculus, couldn't solve this problem, either, and finally said that VR could be free and still not find any takers.