videonet has an excellent article we recommend checking out called: There is a market for super-HD that incudes HDR but cable and satellite will still prefer UHD
A quote from the article:
Even once it becomes clear which specification(s) will win out, there is likely to be a market for television sets that support HDR and sets that do not, even if major set makers prefer HDR as a way to sell more expensive displays. Fautier believes the set market will then be determined by the amount of HDR content that is available. If broadcasters provide UHD channels with HDR support then the market for non-HDR ultra high-definition will quickly disappear, he reckons. “And it makes sense that they should push hard with HDR and high frame rate [for UHD],” he argues.