I'm saying that more colors are strictly better than fewer colors, not just a "gimmick", and that the same holds for stereoscopic 3D, modulo issues with implementing it in hardware via (auto)stereoscopic screens.

For example, if you play games on a virtual screen using a VR helmet, you pretty much always want the game to use stereoscopic 3D, because playing it without it would be strictly worse. (Okay, it would consume less GPU resources, which is good, but that would be the only difference, and this would also hold for things like lower resolution or frame rate.)