The Video Electronics Standards Association (or VESA) is the body that can confer official certifications for state-of-the art quality standards such as DisplayHDR on new screens. Its latest update to the criteria by which they are granted is called version 1.1. It calls for ultra-modern specs such as active dimming, as well as tougher yardsticks for color gamut and luminance.
https://www.notebookcheck.net/VESA-s-updated-HDR-standards-may-improve-the-display-panels-of-the-future.434439.0.html