Sony officially states that PlayStation 4 will not have DRM against used games

[osed125]

Max King of the Wild said:

osed125 said:
The disk and the console, no internet needed.

So sony can get money through... telekenes

When the console detects the game is used, then the console simple goes to the internet temporarily for you to put a code or pay the fee directly. It's not always online, you just have to connect to activate your game, no different from online passes.