Quoted from Rdoyle1978:
Not sure If you are replying to me, but IMO we need to think more creatively. 2 (or ideally 3) levels of transparent screens will allow to “float” things above a playfield, yes. But what if the screen IS the playfield? You can create depth with a flat layer at bottom, a middle layer for plastics and lane guides, and a top layer for big toys, mechs, and ramps. There, 3D without goggles because it actually IS in 3 dimensions. 3D printer slicer software does this x 10,000 right now.
Thinking creatively won't do anything. Pinball companies don't have R&D budgets that run into the billions.
Per prior posts, neither current transparent LCDs nor OLEDs have fantastic light transmissions properties. Layering them would make it worse. Pixel responsiveness is bad on the LCDs. Low life time, expense and non-availability in large sizes of OLEDs rules them out.
Also, can you imagine how bad it'd be if you developed a fault with or suffered damage to one of the layers?
Deeproot (or anyone else) are right to look for savings and efficiencies where ever they can to reduce build costs and complication, but chasing unicorns is extremely unwise.