OLED has had lower peak brightness than IPS. It may not be perceptually so because of no-backlight absolute blacks and higher contrast, but the difference start

OLED has had lower peak brightness than IPS. It may not be perceptually so because of no-backlight absolute blacks and higher contrast, but the difference starts to matter in broad daylight where OLED may not be bright enough, irrespective of matte vs glossy.