It's an interim tech for sure hopefully replaced by micro-LED. How long it will take for us to get monitors using that tech is unknown but I expect initially micro-LED will be limited to large TVs while mini-LEDs and OLEDs are the defacto tech for monitors.Yep, OLED is amazing and will serve a lot of people well but it is definitely not for everyone in its current iteration. I don't know how much the tech can be refined but I guess it will never be ideal for monitor use in bright rooms for example.
HDR will also gain more and more traction and super bright highlights will most likely remain challenging. It doesn't matter to me right now but once high quality HDR is everywhere and LCDs have a gazillion zones it will be a different story and I think that future is not very far off. OLED will still have some strengths even then but it may not be as much of a winner as it is now.