I'm with you there, but that's one application to one sphere (gaming)of VR application.

That being said maybe that's all "3D interface with 3D objects" is right now?

So might be more accurate to say: When our current 2D interfaces like file systems/operating systems, entertainment (movies/tv), socializing, etc are addressed a 3D objects in a 3D space.

Aren't most successful rhythm games already 3d? I guess I'm agreeing with you, DDR, Guitar Hero, and Rock Band all are sort of 3d, just not VR.

I mean 3d as in a screen being 2d and VR being 3d

The mod community have made beat saber incredibly immersive in the way of light shows and "wall maps" which go beyond just hitting blocks with your sabers. I'd recommend checking out an example like this - https://www.youtube.com/watch?v=pZd_I86i8eQ - which is like being inside your own personal rave