I'm interested to see how VR affects overall mental health among gamers. There seems to be some crossover between heavy duty gamers and mental health struggles (just from my own observation) and VR is starting to be a natural progression for gaming. And VR gaming is often a real work-out, focusing on a lot of movement as well as physical dexterity.
On the flip-side, I personally experienced some serious post-binge depression after playing Talos Principle VR for a few hours. It's not very physically engaging, with a somber atmosphere throughout. I felt so weird taking off the headset and jumping back into reality.
Though I think both scenarios just go to show how powerful VR could potentially be in the medical field.