I see your point but I think both need to happen. My guess is that the best VR games will only show their real appeal when played, because people don't have a great frame of reference otherwise.

I can look at a PS5 game and decide to buy a PS5, because I know what controller based consoles are like, I know the types of games, I know what I like. I can't do any of that with a VR game because I don't know what sort of headset I like, how it feels, what's important in a VR game that isn't in others and vice-versa.