There has been a lot of speculation on whether Sony changed its stance on used games for the PS4 after Microsoft revealed its own, or if it was a decision set in stone from the beginning, and according to SCE Worldwide Studios President Shuhei Yoshida the latter option is the correct one, as he stated as part of an interview published on the Official European PlayStation forums.
We made this decision early in the process of designing PS4. There are still a lot of people who want to have the physical medium and the option to share with their friends. That’s part of people’s enjoyment of games today and that wouldn’t change overnight. That’s why we decided that the way people enjoy disc-based games should be the same as it is on PS3. The developers support that and our publishing partners support that. And judging by the reaction that we got we are sure we are making the right choice for everyone.
Of course I’m quite sure that this won’t be nearly enough to put the rumors to rest, but the man has said his piece, and the decision to believe him or not is yours. Personally I do, but I’ve always been an optimist by nature.
One thing is for sure: whether the decision was taken early or late, it was a masterful stroke that painted the the console in a very positive light compared to the competition, and even if Microsoft has since changed its own stance, first impressions are hard to cancel.