Don't MicroLED's still have the problem of higher pixel refresh latency than OLED ?
You're thinking of MiniLED, which is just better LEDs behind an LCD.
MicroLED is a whole different ball game, with no LCD at all. It's just red, green, blue LEDs, one for each pixel.
MicroLED is more akin to OLED where each pixel is self emitting. MicroLED is almost the holy grail of displays and will more than likely obsolete MiniLED.