It's a hilariously small niche, but the main factor of it remaining a hilariously tiny niche novelty is the fact that there are next to no fucking full on games for it.
Aside for a handful of titles you can count on one hand, the entire library that is offered to you are essentially tech demos showing what vr 'can do' rather than being replayable games that are over in 2 hours or less. With the better titles being existing games that haphazardly put on the VR compatibility but are better off without the kit like ballisticNG racing
t. owned an index for 5 years now, and the only thing I play on it now is vr mahjong with friends.