The whole point, though, is that big publishers can't go away. It's impossible. And only people that have never worked in any function on a game seem to think they will.
Do you know why music publishers have more or less gone away? They're not necessary. Any 4 idiots with a computer can record an album. Most of what a music publisher did is now handled quickly and easily at very little cost. Management is still needed to book tours, but publishers? Not really.
But you'll never really see movie or video game publishers disappear. These products cost way too much money to make. A 3D FPS costs tens of millions of dollars. Does anyone here think they'll ever be able to crowdsource that? Find any kind of alternate funding? Gabe Newell did because, hey look, he found tens of millions in his sock drawer yesterday. Other than that it requires insane amounts of money. This is why most startup studios looking to do 3D work spend their first few years doing outsourced work - they simply cannot afford to do anything else.
Anyone that thinks they'll be dancing on EAs grave any time soon has absolutely no idea how much time and effort it takes to make a level that looks like something. Doom levels? Yeah, one guy could kick out three of those a day. DXHR levels? When you combine all the work done by all the people it's months.