Image projection where the brain combines two separate images into one cohesive picture by filling in the gaps is absolutely 3D video’s territory, and expansion on that concept was at the very least utilized in the development of VR headsets.
Now, they aren’t one to one, of course, but lessons learned from 3D video were certainly used in modern VR development (and perhaps adjacent to 3D video’s at the time).
3D video isn’t a stepping stone for VR. It’s just one application that VR excels at.
It’s like saying photographs are a stepping stone for screens.
Image projection where the brain combines two separate images into one cohesive picture by filling in the gaps is absolutely 3D video’s territory, and expansion on that concept was at the very least utilized in the development of VR headsets.
Now, they aren’t one to one, of course, but lessons learned from 3D video were certainly used in modern VR development (and perhaps adjacent to 3D video’s at the time).