E3 2013: PS4 Supports Used Games, No Online Connection Required - NewsWilliam D'Angelo, posted on 10 June 2013 / 3,919 Views
Sony has announced at their E3 Press Conference that the PlayStation 4 supports the use of used games. The system won't have any sort of online authentication. You can trade in games to retailers, lend games to friends and sell the games yourself.
Sony also announced that the PlayStation Plus membership carries over to the PlayStation 4.