Asus has shared early details about a new ultra-fast OLED gaming monitor. Scheduled for release before the end of the year, the new ROG Strix or ROG Swift model will be an early example of LG Display's Tandem RGB OLED panel technology, which should deliver 400 nits full panel brightness with a 540 Hz refresh rate.https://www.notebookcheck.net/4-000-nits-and-540-Hz-Asus-shares-details-about-future-gaming-monitor-sporting-new-Tandem-RGB-OLED-panel.1023354.0.html
400 is about perfect for SDR for
100%. Remember you don't have to use all of it but sports and beach scenery will benefit. And brightness slowly declines over lifespan so this is a good starting brightness