I'm imagining an AI VR tutor - heck, with some legal deepfake+AI style evolution, perhaps that tutor could actually be a famous player, talking to you.
The 3D view gives, well, a 3D view, and all the advantages it entails. For example, when you are with a physical real world teacher, you don't have a fixed view. You can observe from any angle, the teacher can observe and correct micro errors. And the senses of scale and proportion are intact, unlike viewing on a 2D screen of arbitrary size at arbitrary distance.
Even the simple POV of VR means that you get to see the techniques in-situ - e.g. seeing the expert's hands on your guitar, and how the technique is supposed to look from POV - rather than the standard teacher-student limitation of e.g. guitar, where the student sits opposite the teacher and sees a reversed image.
But to be clear, my vision of how this would be game changing relies upon a level of interplay between hardware and software that is not yet developed. But I expect it will be, in time, because virtualising real world experiences is arguably the core goal of VR, and (correct me if I'm wrong) but nothing in the music tuition world has yet proven superior to having an extremely skilled one-on-one mentor who can personally guide your every step, "in person" - and this is what VR would seek to achieve here.