Hi there, hardcore VR enthusiast! (Not currently) VR dev here!

The average person wants to park their ass and have content happen to them. VR is a very physically active experience.

VR games most definitely don't have to be physical. One of the most enjoyable experiences I've had in VR is the game Moss - a platformer where you sit down and control a little mouse with your controller, similarly to a traditional non-VR game. You just do it in this amazing world where you can lean in to look at, or around, things.

In fact I do believe more traditional type of games, but in VR, could bring many more people into VR, because of them being more accessible due to the park-your-ass factor and probably less motion sickness. They can also be easier to port to VR. Not that I play sports games, but I could imagine them being extra fun on a 3D court/field/rink in front on you in VR.

Having to get up and be physical just to play a game can often times feel like a chore. But having the option to do so is amazing.