not some, MOST of their revenue comes form accessories and game licenses.You really thought you would be able to use PS3 controllers on the PS4?
I'm not even a gamer like that but why would they do that if they trying to sale those new fancy state of the art controllers? If they did that, people would just take the controller that comes with the console and use their old PS3 as the 2nd controller.
That would be nice if it did, , but business wise it wouldn't be smart on their part. I sure a nice chunk of their revenue is selling $40 controllers
i'll put it to you this way, i work for a company that sales the main product between $4000 and $6000. depending on the model.
the accessories can range from $150 to $1000. depending on which accessorie you get. now granted this isnt for a game. but still. they dont even care if we dont get the right paperwork for the main thing that costs all that money. as long as we get the person on it. they will have to pay out for accessories for a very very very long time. thats where our bread and butter comes from. thats the game all these manufacturers play. especially when you spend a ton of $$ on making each console. that console is probalby worth $800 to $1200. if they sell it for $500 or $600. they will lose money. so why stay in business? cause the accessories and licenses is where the money is at.