I have found the easiest way to explain this is, that each console speaks a different language. Say Xbox speaks English and Playstation speaks Korean it's hard to comminicate between the two without a translator. Both console have the similar "cultures" in that they both play the same games but they cant communicate with something in between. Consoles havent quite gotten to that point and likely wont for a while. Both companies have different consoles and make their own money and if they all did the same things it would pretty much come down to shape and color for personal preference.