>>JohnFe+16
The Web will cease to be an open system, and will become a glorified fax machine and cable TV network. Those few who care will turn to more esoteric, incomplete, user-unfriendly but open systems. Eventually one of those systems will gain popularity with nerds, academics, and weirdos. They'll fill it with information and media they compile and create in their spare time, and it will interoperate in useful ways that for-profit corporate networks can't. Over time it will gain popularity and "normal" people will start using it too. Money will start to pour in, the network will fill up with garbage, and then corporations will come in and take it over and lock it down.
Rinse repeat.