3D interfaces so far usually mean you navigate a 3D model of some digital space which appears to you behind a 2D screen accessible with a keyboard and a mouse which are 3D physical objects in your 3D real world (keyboard,video,mouse).
3D interfaces are quit different without the 2D screen barrier and either your are inside the experience (VR) or the experience is outside around you (MR/AR).
3D interfaces are quit different without the 2D screen barrier and either your are inside the experience (VR) or the experience is outside around you (MR/AR).