Uli Plank wrote:Maybe, since it works on Mx Macs and even iPads. See Dado Valentic, a very respected colorist, going overboard here regarding iPads
Haha, I mean, I get his sentiment, and he's right. It's a very welcome tool for the industry and Apple products themselves are predictable in the sense that there are not a lot of variables display tech wise. There's XDR with pretty much the same spec for the monitor, Macbooks, iPad, and there's the normal Display P3 ones. But I don't think that part is a possible reason. Whether or not the display plays nice is up to the user, perhaps some management mechanic in Windows OS is holding them back but others like video players or Premiere are capable meanwhile.
Howard Roll wrote:A 1000 nit display can put diffuse white at 1000 nits because white is the brightest value in rec709. On the same display in HDR diffuse white sits at 203 nits. PQ allows for several stops over ""diffuse white".
I'm having trouble understanding what you're trying to point out here. In your first post you said
Howard Roll wrote:I’m curious as to the expectation of full white in HDR.
Do you have a question regarding white in this regard? Or did you want to make a point?
SDR and HDR are functionally different things. Setting the larger gamut aside the way luminance is distributed across the available dynamic range matches perception much more than SDR can. Viewing an SDR image at the typical max brightness of SDR displays around 350nits just stretches the low dynamic tone mapped range to that luminance. It looks very ugly compared to HDR and if talking in the context of a grade it deviates greatly from creative intent. This is mitigated a lot in HDR.