The battle between Dolby Vision and HDR10+ has been waging for years. Both standards use "dynamic metadata" to adjust brightness on a scene-by-scene or frame-by-frame basis. The most touted benefit is that dark scenes can look more like their creator originally intended. Dolby Vision has a slightly wider color range and a higher maximum nit brightness, but the company charges royalties. HDR10+ is royalty free, and the partners behind it have opened a licensing and certification logo program to other TV manufacturers.
While we're getting closer to the hardware being in more living rooms, the only HDR10+ content so far is the Amazon Prime Video HDR catalog. Previously, 20th Century Fox agreed to bring the standard to its new releases, but we haven't seen any yet. Now we can be on the lookout for UPHE movies and shows in HDR10+, too. That means you could see films like Green Book in a whole new way -- though it's hard to say when.