Could two or more screens be used for a 3-D effect?
I think you’ve hit the nail on the head for the best possible uses. Think of adding multiple layers, and not just one or two, and being able to reorder what’s being displayed on each layer.
Operating rooms, for nanosurgery, construction, mining, a whole new paradigm in Cad-Cam, etc.
Now imagine, for instance in an operating theater, 3 or 4 surgeons having a display and being able to reorder each one independently of the others.
Keeping in mind that the last physical screen will need an opaque backplane.
Pretty exciting stuff.