I hope they start with small array counts and build up from there.. you can imagine them having a "super bright super low power small display with 200x400 pixel

I hope they start with small array counts and build up from there.. you can imagine them having a "super bright super low power small display with 200x400 pixels" actually being useful in plenty of places.. then build up from there step by step.. So if AR is that application then, great. But don't try to jump from barely manufacturable to 4k2k VR display as your first step.. sort of like Lytro -- they just were like, "yea we just need to be able to make the densest highest quality and highest lens count micro lens array in the world to be successful!" My advice to the microLED people.. start small.. no pun intended, but yea.. don't try to hit a grand slam on day 1.