Like I said, the initial wow factor, which will wear off. A game or movie or experience is either good or not. VR will not change that.
VR actually makes games worse, because the control system is either disconnected from the experience, making you objectively worse at the game, or you're using unresponsive motion controls. Either way, it's worse. Sure, being bad is immersive, and realistic, but it's still bad.
Also, sunk cost fallacy. If you have spent all that money on something stupid, the likelihood of admitting how stupid it was decreases. It's not just about money either. Some people have invested time, or got hyped about it, so the only possible response is to say it was awesome, even if it wasn't.
In a few years, when companies have realized how little money to be made there was in VR, they will stop making it. There will still be fans, and they will say how great it was, and be sad it never caught on, blaming cost, or the consumer, or companies for making bad games, but it will go away.