Originally Posted by flyguyjake
Projectors currently are not or would never be capable of HDR high light output?
They are if you are willing to make the image about 3' wide
There are projectors with much higher lumen levels, but they tend to have low on/off CR and as an HDR10 document makes clear, just making the images brighter doesn't make them HDR.
That is one of the problems with projectors since we don't have zones like some LCD TVs and can't make black be black with even a single white pixel like OLED can.
We are stuck with our on/off CRs for the whole screen, so even if you made the images 3' wide the black floor would go up too.
On the other hand, big images that fill our field of view don't necessarily need to be as bright. Dolby's own HDR projectors only got to 100 bits in their commercial theaters, but the content is mastered for that. Being a niche the odds of us getting HDR material mastered for projectors seems pretty slim, so we will do what we can with stuff mastered for much brighter.
I think the main advantage of HDR might be that the people mastering it will be looking at bright images with high CR and so might not leave as much garbage in our sources.
I also separate HDR out from 10 bit and WCG because DCI content has higher bit depth and WCG, but is SDR.
We should get plenty of content that is 10 bit and essentially P3, but not HDR. The reason being that there is plenty of material where that would not be modifying the content from its original intention like HDR is.
That is, converting older material to HDR is kind of like colorizing black and white movies, but making a version that is 10 bit and P3 from film and DCI content is not.