Oled has been here for a while in phones. Most phones in the mid-range+ contain Oled.
High-end TVs already have Oled and are getting cheaper each year.
The next move is Micro-led, which is only currently in a 2 Flagship TVs, 1 from Samsung and 1 from LG. That being said I think the potential is still there for MX to grow, just not as long as you think (unless their DDIC can be used in Micro-led later). As of right now, there is still growth in cheaper TVs moving to Oled as well as computer monitors adopting Oled.