[lstamour]

To clarify slightly - the max brightness is the real feature, and everything else including more bits per channel is just a bonus used to describe colours that are dimmer or brighter in more detail than was possible before. Essentially more bits per channel means greater precision, but the real game changer is how the range has expanded and you can display more details in dim scenes, more details in bright scenes, and, very key for the HDR effect, to have both very bright and very dim content display next to each other. As a side effect, just like how you don’t want your seats to rattle in a movie theatre every time music plays, there’s a difference in visual brightness between “normal” sRGB content and brighter (or dimmer) than usual P3 content. This QR code trick exploits that difference.