I do beleive in it, quiet strongly sometimes, but I feel we are a million miles off from something not only useful, but profitable.
One example I think could be amazing is education. The idea of putting kn a headset, and then being in a virtual room up close with a teacher that is giving a practical science lesson. You could walk around, get within 1mm of the chemicals, and doing all this from the comfort of your home, with 50k other sutdnets taking the same lesson. Not only that, the lesson may not be live. You could have university classes from the best of the best teachers, given to anyone in the world.
Another example would be learning to be a mechanic, or even just being one. Say there's a vehicle you've never seen before, you need to change something deep withing the front of the vehicle. You put on your vr headset, load up the manufacturers vr instructions, and now have a full 3d life like view of the car and all that's needed. You can literally put your head into the engine, see where that screw is hidden, etc. Then take off vr, now you know how to fix the problem.
I can see a great use for it, but for now, it's too expensive, and too limited.
There's plenty of YouTube how to fix videos, or examples where you might be stuck and vidoe call someone to give advice and help. Vr could replace this and do a much better job, however who buys first? You won't buy until the service is there, and you won't make these services, until users have them. There needs to be a bigger push to make people buy vr for something that can clearly exist and a clear benefit to purchasing. Games are the most obvious, and porn.
It's like the Internet in its beginning. What on earth did I as a 10 year old do in the Internet when it first came out? You couldn't buy anything, no online multilayer games,