Producing enough light for a larger display requires power, requires mass, interferes with the light weight of the phone. Decouple the display and the phone. C

Producing enough light for a larger display requires power, requires mass, interferes with the light weight of the phone. Decouple the display and the phone. Correct. Which is why my prediction is a heads-up display in glasses, driven by the "phone" in your pocket. Computer displays as we know them will mostly go away, but we'll effectively have infinitely sized screens.