https://techcrunch.com/2018/06/04/apple-tv-gets-dolby-atmos-and-streamlined-sign-ons-for-channels-and-services/

Apple TV, still definitely not a hobby, has some new features being added as it grows. Tim Cook mentioned that there are 50 percent more users now than there were last year, and no doubt they’ll be happy with the addition of Dolby Atmos audio and some nice sign-on streamlining.

Apple TV is now the only streaming player to be both Dolby Atmos and Vision certified. Assuming you’ve got a 4K HDR-capable TV, it could be nice to have, since iTunes boasts the biggest selection of content for those — but since hardly anyone does, it’s more of an aspirational feature at present.