"As a consumer, that many different video standards is a daunting idea that brings to mind the format wars of yore (think VHS vs. Betamax or Blu-ray vs. HD-DVD). Fortunately, while the fact that there are now four standards — HDR10, Dolby Vision, HLG, and Advanced HDR — for companies and consumers to consider when it comes to new televisions, the reality is that things aren't quite as problematic as they seem.
While HDR may come in a lot of forms, the specific requirements for each standard make it much easier for TV manufacturers to support multiple standards despite the variety. Let's break down what the different formats are, who supports them, and why the differences may not be so scary after all."
Don't be afraid of the HDR format wars - The Verge