So PS4 already has keyboard and mouse support that's nice.
I think not too many devs use this feature on PS4 because there's not too many dev history of rts or games that use the device on Sony's platform. MS is different on that matter. If they can bring more inhouse rts and games that use it maybe other devs will release more games that use keyboard and mouse. And if it's popular on Xbox it will become on PS4 to some extent. I think it's good for gamers, we should hope this works. The more genres to come to consoles the better.
Just because PC has many rts doesn't mean I wanna play on PC... I want these games on consoles too.
Unless we want to see it as a negative I don't see how this is a negative.








