High Hz on OLED produce excellent strobeless motion blur reduction with fast GtG pixel response. It is easier to tell apart 60Hz vs 120Hz vs 240Hz on OLED than LCD, and more visible to mainstream. Includes WOLED and QD-OLED displays.
Will they release a 27" form factor 1080p OLED with 400Hz at least anytime soon? If not, a QHD that has dual mode switch to FHD. I play CS2 but I also play other games.