The "unique" experiences of something like having the best seats in the stadium or more immersive experience with a golf simulator would be awesome. But for movies, it takes a commonly social experience and makes it strictly solo. You cannot use a shared VR headset. You may experience the same thing at the same time (or similar since you'd be looking in different directions, most likely), but it wouldn't be common. Would you really want a date night where you sit on your couch and each put on headsets blocking the other out? A family night in, everyone trapped in their own VR headset. What do you do for guests?

Let's not even address cleanliness (honestly, one reason I have no interest in most of the 3D TV tech that came out, even if it offered cheap, passive glasses).

It's useful, and cool, but really only applicable when you're physically alone or wiling to be deliberately isolated from others in your physical proximity.