Not trying to be an ass either, but I would recommend you do some research into TCP/IP and computer hardware. The only differentiating factor between the consoles besides hardware (which does not matter), is operating system. This what separates a console from PC or a phone.. Etc... If something is developed with cross platform in mind then it's entirely up to the developer what systems they want to include. Generally consoles don't allow this because of the constant competition between them. I believe Microsoft tested this with halo but canceled it after seeing the huge advantage PC players (mouse/keyboard) had over controller users.