Having spotted the above device for the PS4, I had a look for anything for Xbox One.
Noted the following device, called a XIM 4:
http://www.windowscentral.com/how-us...board-xbox-one
On some other web page, it was mentioned that Blizzard didn't like the keyboard/mouse combo for consoles in Overwatch and may have stopped it, somehow. Too much of an advantage I guess?