> there’s probably lots of historical/legacy reasons for the way things are with hdr That's pretty much it. If you use a HDR TV it will usually work like you d

> there’s probably lots of historical/legacy reasons for the way things are with hdr That's pretty much it. If you use a HDR TV it will usually work like you describe. It would display the same white for a normal white PNG and an "even whiter" "HDR" PNG. Apple's decision makes sense if you imagine SDR (so not-HDR) images as HDR images clipped to to some SDR range in the middle of the HDR range (leading to lots of over- and underexposure in the SDR image). If you then show them side-by-side of course the whitest white in the HDR range is whiter than the whitest white in the SDR image. Of course that's a crude simplification of how images work, but it makes for a great demo: HDR images really pop and look visually better. If you stretched everything to the same brightness range the HDR images wouldn't be nearly as impressive, just more detail and less color banding. The marketing people wouldn't like that