Navigation in VR is a barely solved problem. Most games have players teleport between positions instantly because a continous motion would create a sensation of

Navigation in VR is a barely solved problem. Most games have players teleport between positions instantly because a continous motion would create a sensation of conflict between balance reported by the inner ear and the perceived motion. That means instant nausea. Positioning objects in 3D precisely and conveniently without a 3D pointing device is hard, too. The best option for that is a mouse and crutches like handles oriented along coordinate axes. But that only works because the mouse pointer has a reference plane it moves on (the projection plane for the 3D view). In VR, this plane is tracking the head precisely. You cannot reasonably put the mouse cursor on that plane. You would need a different reference plane and then you're back to all the problems that 3D input on a 2D screen has. And a positioning objects in 3D with a keyboard is even more tedious.