For over a year now, we've been told that official keyboard and mouse support would one day come to Xbox One. That support is almost certainly coming. But it probably won't take the form that hardcore gamers would like. And it most certainly won't usher in a new age of PC vs. console multiplayer gaming. Unless something changes, that is.
The issue, for the non-gamers in the audience, is that gaming on a PC with a keyboard and mouse is far more accurate and offers better performance than gaming (on a PC or a console) with a controller. So a match in which one player is using a keyboard and mouse and another is using a controller would be decidedly one-sided. In favor of the keyboard/mouser.