VR movies are two qualitative steps into the future, not one. IMHO, the hierarchy goes as:
- 2D movies
- 3D movies
- 360° movies
- VR movies
Since 3D movies aren't yet the default, I feel it unlikely that we will move to 360° any time soon. Problem is, you don't really need that big of a change in cinemas for 3d, just changes to the projector room, but the screen is the same, etc. 360° and VR require powered headsets for everybody, not just passive polarized glasses. Since they're 3D experiences, people with visual impairments that make 3D cinema not a thing for them will have the same issues with 360 cinema. Once you have the infrastructure for powered headsets with built in screens for everybody, then you can move to VR. VR is mainly 360° with interactivity.