Xbox One S and Xbox One X are getting Dolby Vision support in the new 1810 update, currently available for Preview members.
The feature will be available on both Xbox One S, and Xbox One X. Following the recent revival of Avatars, update 1810 brings Avatars to the dashboard.
Xbox One will soon get Dolby Vision support for video streaming.
This only specifically adds support for DV through video streaming services, not for the Blu-ray player.