I have to confess to being a bit skeptic regarding immersive VR films as an art medium (and I use that term in the broad Hollywood sense). So much of how we currently make films is predicated on being able to control the framing - which essentially is a refinement of plays which operate on a stage. As a medium that's existed for thousands of years and I dont see that form of presentation disappearing as a result of this medium.
I absolutely get the idea of VR for gaming, remote drone control/medical robots, live streaming of events (especially sports - e.g. in cockpit formula 1 feeds), possibly nature documentaries or basically any other medium where the wearer wants to exhibit control over how they are viewing something and probably have some ability to move through a scene.
I also accept that there will probably be some films made in an immersive VR sense - but I do suspect they are going to be very much a minority and probably feel somewhat Blair Witch.