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@SkuterPLwrote:So even if this monitor support HDR I cannot use with my notebook?
Any other Dell notebooks can play HDR?
Correct. HDR support requires the GPU itself to support HDR and for you to use a display output connector that supports HDR. The XPS 15 9560 has HDMI 1.4 and DisplayPort 1.2, neither of which support HDR. It would need HDMI 2.0 and/or DisplayPort 1.4 to do that.
It does not. HDR laptop displays have only just started to hit the market in late 2017 / early 2018 model laptops, and the 9560 is older than that -- in fact the 9570 was just officially announced and will be available to be ordered later this month. Even that model wasn't announced with an HDR display though. That model would at least be able to drive HDR on external HDMI displays since it supports HDMI 2.0, but it wouldn't be able to do it over USB-C/Thunderbolt because that output only supports DisplayPort 1.2, and HDR requires DisplayPort 1.4. The problem there is that DP 1.4 over USB-C/TB3 requires the Intel GPU to support (which doesn't exist yet) as well as a brand new Titan Ridge Thunderbolt controller that Intel has announced but that hasn't been seen in laptops yet.
All that said, don't expect first-gen laptop HDR displays to match the experience of quality TVs. Laptop displays are still fundamentally constrained on power, which means their peak brightness won't be nearly as high. There are different "grades" of HDR certification for displays that focus mainly on peak brightness, and laptops will be on the low end of that spectrum.
(EDIT: Removed incorrect info about the S2718D. I had been thinking of a different display.)
The TB16 has an HDMI 2.0 port, which theoretically could support HDR, but the problem is that it only supports a DisplayPort 1.2 signal coming in from the attached PC, which means it can't receive an HDR signal. And even if it supported DisplayPort 1.4 from the attached PC, your XPS 15 9560 will only send DisplayPort 1.2.
The NVIDIA GTX 1050 is a fairly strong graphics card that supports most technologies out now, but it doesn't support everything, and even if it did, the design of the system means that the Intel GPU would also need to support certain technologies in order for them to be used. The XPS 15 is a powerful ultrabook, but it's still an ultrabook, so it won't support ALL of the latest and greatest technologies the way full gaming or workstation systems would, such as Alienware systems or the Precision 7000 Series. If you don't see a particular feature mentions on a product page or the specs, you should not assume it's supported. And if you aren't sure and support for a certain feature is important to you, then it's a good idea to ask somewhere here BEFORE you buy something.
CORRECTION: My earlier comments about the S2718D were incorrect. I was thinking of the U2518D when I wrote that, so I've removed them. The S2718D does indeed support HDR10.
@SkuterPLwrote:So even if this monitor support HDR I cannot use with my notebook?
Any other Dell notebooks can play HDR?
Correct. HDR support requires the GPU itself to support HDR and for you to use a display output connector that supports HDR. The XPS 15 9560 has HDMI 1.4 and DisplayPort 1.2, neither of which support HDR. It would need HDMI 2.0 and/or DisplayPort 1.4 to do that.
@SkuterPLwrote:So even if this monitor support HDR I cannot use with my notebook?
Any other Dell notebooks can play HDR?
Sorry, I forgot to answer the second half of that question. As @ejn63 says, the XPS 13 9370 supports HDR, but that appears to apply only to its built-in panel. Since the XPS 13 9370 only has USB-C/Thunderbolt 3 outputs and those only appear to support DisplayPort 1.2, that system would not be able to use HDR with external displays. The limitation there is that Intel's GPUs and Thunderbolt controllers do not support newer DisplayPort revisions yet. Intel just released a new Titan Ridge Thunderbolt controller that supports DisplayPort 1.4, but that controller didn't make it into the 9370 and I doubt it will be seen in the XPS 15 9570 either, partly because the GPUs in Intel's 8th Gen Core chips still don't support DisplayPort 1.4 either. My prediction is that the NEXT release of the XPS systems will include GPUs that support DisplayPort 1.4 over USB-C and the Titan Ridge Thunderbolt controller to carry it across Thunderbolt 3. However, the XPS 15 9570 also has a built-in HDMI output, and the 9570 is confirmed to be getting an upgrade to HDMI 2.0 there, so that should be usable to run HDR on an external display.
The only current Dell systems I'm aware of that support HDR on external displays are the Precision 7000 Series models, because they have a native DisplayPort connector that is confirmed to support DisplayPort 1.4, discrete GPUs that also support DisplayPort 1.4, and a more complex motherboard design that allows the user change a BIOS setting to allow the discrete GPU take direct control of the display outputs, which means that it doesn't matter that the Intel GPU in those systems doesn't support DP 1.4.
