Apple has surprisingly added video streaming support for the HDR10+ format in the Apple TV app in its new round of operating systems.
Update: Apple has removed all references to HDR10+ on their public-facing websites. We are following up.
In addition to HDR10 and Dolby Vision, the Apple TV app will soon support HDR10+. Like Dolby Vision, HDR10+ uses dynamic metadata to improve the HDR picture on a scene-by-scene basis.

- "HDR10+ support. The latest generation of high dynamic range technology is now supported in the Apple TV app," said Apple.

The company confirmed that HDR10+ will be supported in the Apple TV app on iOS 16, iPadOS 16 and macOS Ventura.

There is no word on tvOS 16 yet (list of features has not been released) or other TV platforms where the Apple TV app is available such as Android TV, Google TV and Samsung Tizen. You can see which TV models support HDR10+ in FlatpanelsHD's TV Database by using the HDR10+ filter.

 Also read: tvOS 16 to include cross-device features, improved game controller support


 The Apple TV app is today available on most TV platforms and consoles

The content
It is also unclear what content will be available in HDR10+. While we expect Apple TV+ shows and iTunes movie rentals to continue to be released in HDR10 and Dolby Vision only, it is possible that TV partners such as Paramount+ will offer content in HDR10+ from within the Apple TV app.

HDR10+ was launched in 2017 by the HDR10+ alliance by Samsung, Panasonic and 20th Century Fox as an alternative to Dolby Vision.

 Also read: HDR terminology demystified

In addition, the Apple TV app will get "rich video previews at the top of the Apple TV+ tab help you discover your next favorite Apple Original".