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SvennoJ on 20 February 2019
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Lauster said:

Thanks Don and John for your answer.

DonFerrari said:

It was already mentioned here, the contrast.

You'll be able to differentiate much better the levels of dark or light. So when you are in a night scene or open area with lot of sunlight you'll see better all the elements on the screen instead of what we have today that things get hidden in plain sight due to scene being to dark or bright.

But of course the effect will need both a good panel and content. Some "HDR" panel and content are very light on the contrast ratio.

Yes, as Svennoj experimented in GT Sport for example. I think it's something I can notice, but if I have the good panel and content as you said.

 

John2290 said:

Of course there is, the luminosity is the main focus for me and trumps all else. Having three different light scoures or more crossing each other in Metro Exodus and one seemingly blinding you yet still being able to see the environment as if through the light rays in Metro Exodus Is crazy cool. I don't know much about colour blindness but surely having bmmore natural lighting scoures with a wider range from black to full luminosity would have to be a boon for the colour blind more than anyone else, No?

Yes, it's still a better option, I suppose, even if the gain is much less than a person with normal vision. Does the lumen power of a panel depends on its HDR capabilities ?

 

For explaining color blindness, pictures are better than words :

https://hitek.fr/42/vision-des-couleurs-daltoniens_4682

(scroll down to examples)

In my case, it's a deuteranomaly, and I can't see any difference between a deuteranomaly picture and a normal vision picture.

Thus, about color perception from HDR, I'm not sure that I can see the difference with a No-HDR display.

To clarify HDR is not about color, it's all contrast and brightness. Wide color gamut and 10 bit color are separate things.
More bits means less color banding, 1024 steps for each color instead of 256. Gradients look more smooth no matter what color.

HDR is all about brightness range. Normal tvs range from 0 to 50 nits, HDR expands this logarithmically to max 1500 nits on current tvs, while GTS has the option to go up to 10,000 nits for max brightness. For comparison a clear bright sunny day is about 30,000 nits.

Color depends on what the content was made for. Rec.709, DCI-P3 or rec.2020. GTS is made for rec.2020 however most tvs can't quite reproduce DCI-P3 yet.

The full spectrum represents human vision.
As you can see wide color is determined by brighter primary colors allowing for better coverage of the human spectrum. Since you have trouble with reds and greens you will lose out on most of the benefits of a wide color gamut. Blue gets the least advantage of the wider color gamut.