I voted for HDR10/HDR10+/Dolby Vision, and also more, HEVC HLG HDR/VP9-HLG YouTube HDR/VP9-PQ YouTube HDR/Technicolor HDR (if this later will become operational).
A playback device, TV or audio-video receiver, should be able to playback any content.
It is content that matters most for consumers, not content format.
Consumers should push for universal HDR TV in the same way audio/video receivers have universal support for audio formats (Dolby Digital / DTS / Dolby Atmos / DTS:X / …).
Thus, it doesn’t matter what HDR format a given program uses; a TV that implements all formats can accommodate the content and display it to its best advantage.
Furthermore, coexistence of different HDR formats within a TV is technically possible, because HDR formats are just software (decoding / mapping software) at the TV level and modern TV are compuTV (computer + TV).
And software development is much easier and faster on HDR TV’s modern operating systems than on rigid and complex DSP platforms of audio/video receiver.
There is a precedent.
There was a NTSC-PAL-SECAM color system TV war.
But in the end, we have NTSC/PAL/SECAM multi-system TV, because the TV manufacturer’s business logic is to meet the consumer requirements and to sell TV which allow consumers to be able to take advantage of any content they want.
In France for example, at the beginning of the color TV war, French people were happy with their SECAM TV, which is incompatible with a PAL content or with a NTSC content, like a HDR10 TV is incompatible with a Dolby Vision content streamed on Vudu.
Then there were people who wanted also to enjoy PAL DVD and required PAL/SECAM TV.
Then there were people who wanted also to take advantage of NTSC DVD and required NTSC/PAL/SECAM TV.
Many latest TV for the U.S. market are NTSC/PAL/SECAM multi-system TV like:
. 77" LG OLED77W7P
. 75" Sony XBR-75Z9D
. 75" Samsung QN75Q9F
For the moment, high-end TV manufacturers should commit to support all operational and being standardized (i.e. via committed upgrade) HDR formats.
A Dolby Vision compliant TV can be upgraded to HDR10+: Dolby Vision is currently the most complex HDR format due to its dynamic metadata display adaptation and its 12-bit dual layer architecture. Therefore, if a TV System-on a-Chip is powerful enough to support Dolby Vision, this TV SoC is able to support any other HEVC HDR format.