I can assure you that wasn't the case. I played GoW4 on PC and while after a certain time, xbox players had the option to not play with PC players, the vast majority of players with whom I played were console players. I feel like having one or two pc players per lobby ruined the fun for them, because the boltok was incredibly broken with M+KB.I think Gears of War 4 worked by only matching you with people that had the same input device. I wont be surprised if they do the same thing here. i.e. controllers only play with controllers, M&K only with M&K.