There's no word yet on if pricing will be any different than traditional surround sound files but we do know that Apple will offer a free upgrade to Atmos-enabled movies and shows like it did for 4K HDR/Dolby Vision films when those formats first hit the iTunes Store.
The tvOS 12 update will also bring what Apple is calling "zero sign-on", which, more or less delivering what it says on the tin, means users won't have to type in their passwords. As long as a viewer is connected to a cable provider's broadband network, the Apple TV will automatically recognize his or her credentials, and apply them instantly. With a tap of the Apple TV remote, users will be able to find out the locations of specific Aerial screensavers.
Also with tvOS 12 will be new aerial screensavers from footage shot by astronauts aboard the International Space Station. For example: You can sign in with your cable provider one time, and every app from SyFy to ESPN to Disney will automatically recognize you as soon as you download it. It will be the only streaming box to do so although it requires a compatible sound bar and TV. Apple TV designer Jennifer Folds said other cable providers will join in the coming months.
Apple TV introduced a better picture in 2017 with 4K HDR. The technology manages to provide immersive 360-degree surround sound, and with Apple TV 4K, you won't need a lot of hardware to achieve such a set up.
This is clearly a minor update for the system, but the inclusion of Dolby Atmos is certainly a welcome feature for a TV box. tvOS 12 will be released this fall.
Apple also announced that they are enabling support for select 3 party remotes.