Well. Here's a weird turn. I gave up my Xbox Series X after using HDR10+ on Apple TV. Very impressed. No looking back. I turned my Xbox on and downloaded the Witcher update. Clicked on Vudu to watch some Indiana Jones, and was surprised by the quality of the image. Jumped to different apps, and started to realize they were all pulling HDR10+ images. I ran through different scenes from 10 different movies and determined almost all of them were playing some converted Dolby Vision into an HDR10+ format, similar to what the Apple TV 4K was doing. My first thought was that all services updated their HDR content to be able to output into HDR10+ format when applicable.
Then things got weird. I put in a 4K disc and was stunned that the movie was playing in what looked like HDR10+. I put in multiple other discs and all of them had a better image quality, better brightness and overall what looked like metadata. My assumption is that the Xbox updated on 12/8 and included something that converts HDR10 and DV into HDR10+. I assume that the Apple TV 4K has similar conversion software. I understand maybe this is a placebo effect. My TV does not have the ability to say if it is playing in HDR10+, Samsung did not provide that in an update, just the ability to do HDR10+.
The only evidence I have is this. While on Apple TV looking for different movies, some said HDR, some said Dolby Vision. Normally this just said Dolby Vision. I thought that was weird. After looking long and hard I finally found a movie pop up saying that it played in HDR10+, which I believe means that the Xbox is outputting or has the capability to output in HDR10+ as well. Why Microsoft and Apple are using a conversion technique and not advertising is anyone's guess. Image below of HDR10+ option, which does not appear on my Ipad or my PC when looking at this film.
Apple TV HDR10+ Option
I wouldn’t read too much into what you’re seeing on your Xbox, that’s just the ATV app showing what certain titles are now available in so doesn’t necessarily mean that’s what they’ll actually be playing out in. (I’m not familiar with Xbox so wouldn’t know if it’s even HDR10+ capable)
My Apple TV HD which is incapable of displaying said format and shows exactly the same via the ATV app as in your screenshot.
There’s also no conversion going on with iTunes movies or ATV+ content either as quite a lot of Dolby Vision titles are playing in HDR10+ from source.
That particular title as many others were originally listed as being 4KHDR, since the ATV4K 3rd Gen was released certain titles are now available in HDR10+ on compatible devices.
Here’s a list of just some of the former HDR titles that are now HDR10+
A Good Day To Die Hard
American Gangster
American Made
Apollo 11
Apollo 13
The Blues Brothers
Bohemian Rhapsody
Braveheart
Darkest Hour
Dawn of the Planet of the Apes
Die Hard
Die Hard 2
Die Hard with a Vengeance
Die Hard 4.0
Drive
Dr.Seuss’ How The Grinch Stole Christmas
Emma (2020)
Exodus: Gods and Kings
The Fast And The Furious
2 Fast 2 Furious
The Fast And The Furious: Tokyo Drift
Fast & Furious
Fast & Furious 5
Fast & Furious 6
Fast & Furious 7
Field of Dreams
Get Out
The Greatest Showman
Halloween (2018)
Harriet
The Hate U Give
Heat (1995)
Hellboy II The Golden Army
How To Train Your Dragon
How To Train Your Dragon 2
How To Train Your Dragon The Hidden World
Howard The Duck
The Hunt
The Huntsman Winters War
Jurassic Park
Jurassic Park The Lost World
Jurassic Park III
Jurassic World
Kingsman The Secret Service
Kingsman The Golden Circle
Licorice Pizza
Logan
Mamma Mia
The Martian
The Maze Runner
Maze Runner: The Scorch Trials
Minions
Morgan
The Mummy (1999)
The Mummy Returns
The Mummy Tomb of the Dragon Emperor
The Mummy (2017)
The Outfit
Pitch Perfect
Pitch Perfect 2
Pitch Perfect 3
Predator
Predators
The Purge (2013)
Rise of the Planet of the Apes
Robin Hood
Serenity
Shrek
Sicario
Smokey and the Bandit
Snow White and the Huntsman
Split (2017)
Spy
Terminator 2: Judgement Day
The Thing (1982)
To Kill a Mockingbird
War of the Planet of the Apes
X-Men
X-Men 2
X-Men The Last Stand
X-Men Days of Future Past
X-Men Days of Future Past - The Rogue Cut
Yesterday