Microsoft is giving Xbox Insiders a preview of system update 1810. Xbox Wire reveals the update contains several new features -- some of which will be trickling out over the coming weeks, including Dolby Vision video streaming, dashboard avatars, an expanded search feature, and improved linguistic diversity when using the narrator function.
Dolby Vision or Dolby Vision HDR support will allow compatible televisions to improve upon standard HDR. Compared to HDR10, Dolby Vision has increased color depth and dynamic metadata, which means video content on Xbox One S and Xbox One X can be displayed with greater scene-by-scene precision. However, you'll need a premium Netflix subscription to access it.