Somewhere in another thread someone mentioned an idea that the windshield is actually a transparent LED. That is probably the furthest "out there" thing that could be possible.
The logical problem in my head is balancing the idea that there must be some kind of one-of-a-kind feature coming with the purpose of the Model 3 -- EV for the masses. This makes me think that it is likely software based rather than an expensive piece of hardware. Though I suppose it is possible there is something in store that is just an expensive option. I.e., the LED windscreen is a $7,000 upgrade.
Well, LG is sourcing the 15" screen. They are the biggest manufacturer of OLED's, too, including massive flexible, plastic, transparent OLEDs. But, that does sound hella pricey--way more expensive than an instrument cluster