PlayStation 4 DRM policies clarified by Sony@ 2013/06/12
"There's gonna be free-to-play, there's gonna be every potential business model on there, and again, that's up to their relationship with the consumer, what do they think is going to put them in the best fit. We're not going to dictate that, we're gonna give them a platform to publish on. The DRM decision is going to have to be answered by the third parties, it's not something we're going to control, or dictate, or mandate, or implement."
That's the new word out of Tretton's mouth, which seems to indicate that players like Electronic Arts, Ubisoft, Treyarch and pretty much any PS4 game maker outside of Sony's own umbrella can cobble together any combination of policies they want. You could say that it's not too different from how the PS3 operates today, but there's still plenty of room for clarifications across the industry. Hit up the source link for the full spiel.
Update: Sony itself has responded with the following: "Similar to PS3, we will not dictate the online used game strategy (the ability to play used games online) of its publishing partners. As announced last night, PS4 will not have any gating restrictions for used disc-based games. When a gamer buys a PS4 disc they have right to use that copy of the game, so they can trade-in the game at retail, sell it to another person, lend it to a friend, or keep it forever."