I hope this changes things. I've read a lot about Dolby Vision. While much of it is speculation, there's a significant amount posted on forums that indicates getting Dolby Vision (DV) from say a Ultra Blu-Ray player through an AV receiver to a TV isn't predictable even if all devices support DV! Many manufacturers are denying DV support or at best a wait and see approach. Apparently, not only do devices need to support DV, the apps that run on them also need special tweaking. An engineer at Vudu indicated a while back that player and TV combinations are "hit and miss" -- and I infer from his tone it's mainly the latter.
I have an LG OLED65B6P that works great when streaming DV and HDR10 content directly. Unfortunately, audio from the TV is limited to lossy Dolby Digital 5.1 and I'm hoping for something better. That would require a streaming box to pass DV to the TV and it needs to pass through a Pioneer Elite SC-LX701 AV receiver. Success looks iffy or at least a long way out.
With a "software" solution (no dedicated hardware), things may get better but it's still up to manufacturers to implement DV and pay the license fee to Dolby. They need to see a financial incentive to do so.
I have to keep reminding myself that all of the HDR world is pretty new and patience is needed. But HDR is the real Ultra HD improvement over HD. Extra pixels on a 65" screen at 8' is just noticeable but HDR is a big viewing improvement.