Twitter of course) with the corresponding number for the PS4.
It's maybe not news that will matter to most players, but it does make eight-player local Bomberman a possibility on Xbox One, and that would be grand. As to how many Xbox One games will support local eight-player in reality ... we'll see.
It's also a curious reversal of the current-gen situation. As Videogamer points out, the PS3 can support up to seven controllers at once, while the Xbox 360 goes up to four.