I'm not part of the industry or well-read on it so I can't well explain why, but if I had to guess this is due to the dramatically smaller volumes involved. Th

I'm not part of the industry or well-read on it so I can't well explain why, but if I had to guess this is due to the dramatically smaller volumes involved. There's far fewer desktop monitors and laptops being shipped than phones or TVs, and the majority of desktop and laptop panel sales are tied up in basic office-grade econoscreens and gaming monitors focused on high refresh rates and low input latency. Midrange/affordable laptop/desktop OLED panels fit neither of these categories and as such haven't received nearly as much investment and R&D.