@dcseifert listening to the latest Vergecast and your analysis of OLED vs XDR miniLED LCD screens is missing one key component: pixel response time.
Apple's XDR displays have worst-in-class pixel rise time (black to white) of 40-100 ms. This exhibits in smearing, even doing simple things like scrolling through a social media feed (worse in dark mode).
OLEDs, by comparison, have a rise time of <1ms these days.
So the ultimate improvement of an OLED over XDR display is in motion clarity.