Xbox One S will upscale games to a 4K resolution as well as supporting 4K video playback, Xbox marketing exec Aaron Greenberg has confirmed.
Speaking to IGN last night, Greenberg explained that certain games like Gears of War 4 and Scalebound are being optimised to take advantage of HDR technology, which is available with newer 4K TVs, and that all Xbox One content running through the console will be upscaled to run at 4K.
It's important to note, of course, that this doesn't mean Xbox One games will run at a native 4K resolution on Xbox One S, nor is it clear how much of a difference it will make over your 4K TV's internal upscaling.
Project Scorpio, however, which was announced during Microsoft's press conference yesterday, will support native 4K gaming and be backward compatible with all Xbox One titles when it releases next holiday.
Xbox One S launches this August with prices starting from $299 for the 500GB Model up to $399 for the 2TB Model
Source: IGN (thanks @HuntedPixel)