They lost me at HDR10+. What a useless standard created just because Samsung was unwilling to play ball with Dolby and had to do their own thing. I have yet to buy a Samsung TV as a result of them not supporting Dolby Vision.
HDR10+ and Dolby Vision are pretty much the same thing with tiny differences that don't matter. For example, while DV supports a 12-bit color depth and HDR10/10+ supports 10-bit, it's nearly impossible to tell the difference for moving content. Running 12-bit requires more processing power on both the GPU and the display. Professional color grading experts grading for final releases would want 12-bit during the grading process, but even in the theater, nobody is going to notice the difference if the final output is 10-bit or 12-bit. Even 8-bit looks good, as long as it's not dithered 6-bit to 8-bit conversion, that's sloppy and looks terrible and new cheap TV's are still selling with that.
The important thing is that HDR10+ is open source and requires no loyalties to use. I'm all for open source. While Dolby Vision is better, by specs, you're just paying Dolby extra for something that doesn't matter in the real world. 8k displays are sharper than 4k displays, but literally every AV professional will agree that you don't need 8K for anything, and when watching content between the two, at a normal viewing distance, you cannot tell the difference.
Ultimately, what separates "HDR" from HDR10+ and DV is dynamic metadata. This is where no game has ever come forward as a feature. Being able to dynamically and automatically adjust HDR content based on that very particular moment is a revolutionary addition to the HDR world of gaming, and something I very much welcome.
An example of standard HDR in PC gaming is RDR2. No dynamic metadata. It's not the greatest implementation of HDR and requires proper tuning to get just a basic decent scene, but it's not the worst either. Some scenes absolutely shine with realism, brilliant bright skies, excellent color and contrast. Other scenes are muddled, grey, too dark, too bright, with terrible contrast. This is where HDR10+ or DV would fix things, but DV requires licensing and a display that supports it, and most devs would say "hard pass".
One size does not fit all when it comes to HDR, and that's where HDR10+ and DV's dynamic metadata step in.