As someone with a VR headset that supports all the games, those headsets are already sunk. Right now, gaming is all that exists in the VR world, because all headsets currently are horrendous for any other task other than gaming. I own a Quest Pro and have attempted to use it for work, but the poor resolution horrible passthrough make it quite uncomfortable to use. For games, it’s great.
I’ll be ordering a Vision Pro primarily to use as a display for my Mac, but also for development purposes. It is definitely a niche product at launch, but I think it’ll grow into the consumer space over time - it is really only niche because of the price tag.
Games will come, but gaming is the “easy” part of VR because you control the entire environment. AR interactions are what will make this into a viable computing platform that actually moves beyond the current 2D paradigm.