A:Answer Yes, this TV supports HDR10.
Although there is something you should and that there is currently a format war going on with which HDR format will become the 4K standard. There are currently two formats, HDR10 which is an open format, can be installed via firmware update and is a lot cheaper for companies to not only install but use. Then there is Dolby Vision HDR which needs to be physically installed the TV, requires specific parts and chips from Dolby and has to meet a higher HDR standard. Samsung and Sony are going HDR10, and LG and Vizio are going Dolby Vision and from what LG told me is that after April their TVs will also support HDR10.
Netflix is currently working on bring HDR10 streaming and Vudu already has 4K Dolby Vision HDR which can only be seen from the Roku 4 and Vizio models that support Dolby Vision.
The only issue I have is... If and when a format is selected, one will lose and I don't want to be with the losing side. So if HDR10 loses the format, then our Samsung TVs will be outdated and not be able to play Dolby Vision HDR.