Sony hints the PS4 does contain a feature to block used games, but its up to publishers to use it
During a recent interview with Gamespot, the boss of Sony Worldwide Studios Shuhei Yoshida discussed more details regarding the subject of used games and the PS4.
While in past interviews he stated the PS4 will not block used games, he teased the tech to do so does exist in the console itself. The feature would be entirely optional and left up to individual publishers to decide if they want to use it for their games. He also teased Sony would not be using this feature for any game they develop on the PS4.
The feature would work similar to the Online Pass system which uses activation codes as a way to "lock" a disc to an individual user or account but in a larger scale. Instead of just locking out the game's multiplayer, the entire game itself would be locked out if the game is detected as a used copy. His answer:
GameSpot says -
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