Even after a decade of R&D, microLED will continue to be the "Liquid Metal" of displays for years to come:
I.e. just like LM, it sounds cooler than it is, and barring a breakthrough, is as yet impractical to make in high volume.
I don't think anyone's even made a close up resolution RGB microLED display yet. All the watch-sized displays seem to be monochromatic.
That's why so far, everyone is concentrating on using microLEDs in either giant 30 PPI TV screens, or as high resolution single color backlights.
Hopefully one day someone will figure out how to mass produce it in a type suitable for mobile devices, but so far nobody's even close.