In a state-of-development post yesterday, Epic Games has announced that Fortnite players who use a keyboard and mouse on PS4 will be paired against those using the same control scheme on PC or console.
It means the battle royale game will pair you against players who are using the same peripherals, for example, controller versus controller, keyboard and mouse versus keyboard and mouse.
Input based matchmaking isn’t a part of Fortnite yet. The Xbox One currently has no officially support for keyboard-and-mouse controls.
The matchmaking logic will detect controller input, and group players accordingly. Now, console players with keyboard and mouse input will be grouped up with players on PC, regardless of platform. However, the old rules still apply, in that if you’re partied up with a PC player, you’ll end up in the PC pool for matchmaking regardless of your input device. This is the official language:
If anyone in your party uses a mouse and keyboard on console, you will be matchmade with PC players and other KB+M players (as if you partied up with a PC player).
Epic Games has also announced plans to add some more nuance to matchmaking in order to circumvent unconventional control choices.