There is a huge mismatch in display brightness between what Asus is claiming and what we are actually seeing on a retail unit. Hopefully we can find an official solution to "unlock" the maximum brightness potential of the otherwise impressive 120 Hz OLED touchscreen.https://www.notebookcheck.net/Asus-Zenbook-Flip-15-Q539ZD-OLED-display-is-40-percent-dimmer-than-what-the-manufacturer-is-advertising.631712.0.html
Perhaps the screen is only capable of reaching the 550 cd/sqm when displaying HDR content??