Much as I hate FB, as a piano player I loved their little graphic showing how mixed reality would send the notes down to your hand positions on the piano as an endless Star Wars kind of scroll thing. I would do that just to exercise my mind with some classical or jazz pieces. I can think of a slew of other ways VR is useful. Training doctors for surgery. Training pilots. Mechanical engineering and prototyping. None of that means we should live in VR. Just that it's a powerful tool.