Sony, June this year:

“PlayStation 4 won’t impose any new restrictions on used games. This is a good thing,” said Tretton, to huge applause from the audience in attendance. “When a gamer buys a PS4 disc, they have the rights to that copy of the game.”

Sony’s Software Usage Terms, updated today:

6.3. You must not lease, rent, sublicense, publish, modify, adapt, or translate any portion of the Software.

7.1. You must not resell either Disc-based Software or Software Downloads, unless expressly authorised by us and, if the publisher is another company, additionally by the publisher.