Sorry, I hit solution button by accident. I have played Street Fighter V on my pc with gamepad against friends on ps4 and it worked wonderfully. Also Doom have this too and I never heard about problems. So its easy if Sony would say yes, everyone would benefit from this. If some developer don't want cross platform play, they could deactivate it or not implement it from beginning. Technically it would work, but Sony don't allow this as a default. So every developer have to built this from scratch for each game.