Apple TV 4K and DTS.

Never, probably. It’s been replaced by Atmos. Sorry!

With the recent announcement that Disney + will start streaming IMAX enhanced movies with the IMAX Enhanced version of DTS X, hopefully sometime soon. Sony and Hisense TV’s and various AVRs will support at launch, I hope Apple also follows suit. This will be the first streaming service to offer an alternative to ATMOS and will apparently also feature a higher bitrate for improved sound quality.