Apple’s headset is a new thing, with a lot more features than VR. We’ll have to give it time to really know if it will find a market.
VR’s main issue is price I think, because most people don’t want to spend a grand on a gaming peripheral system. So the VR market is a niche but seems to be going well from what I can see in the Steam store. I’ve been playing mostly VR games since I got an Index set, because it’s a lot more interesting and fun overall than regular 2D games. The fighting games are good exercise too.