In the VR modding scene for games (things like Minecraft Java edition being playable with an Index), SteamVR/OpenXR has become the defacto standard already, and in games like VRChat, the vast majority of high quality content needs a PC with SteamVR running to have it function.

VR will probably remain a dedicated niche for a long time, but innovation and embracing open standards will continue to happen :)