PS4 'won't impose any new restrictions on your use of PS4 game discs'

"We are equally focused on delivering what gamers want most... without imposing restrictions or devaluing their PS4 purchases," Jack Tretton said at its E3 press conference, pointing out that PS4 will work exactly as PS3 did, with no online checks and no restrictions on what you do with your game disc. "PS4 disc based games don't need to be connected online to play or for any type of identification," he said, a direct jab at Microsoft's policies.

"If you enjoy single-player games offline, PS4 won't require you to 'check in' online periodically," he added. Xbox One, on the other hand, requires online authentication every 24 hours.

There was a lot of applause.