Why Gran Turismo 6 is on PS3, not PS4

Sony has moved to explain why Gran Turismo 6 is releasing on PS3 and not PS4 later this year.
http://cdn.medialib.computerandvideo...302146_320.jpgPlayStation Europe boss Jim Ryan told the PS Blog: "You had GT1 and GT2 on PS one, GT3 and GT4 on PS2, then there's GT5 on PS3 and a space next to it."The difference between Gran Turismo and GT2 is unbelievable, but they're both on the same platform. The difference between GT3 and GT4 is huge. We're absolutely confident when GT6 comes, you'll see a big step change up from GT5 too. There's still a lot of potential on PS3 that a developer like Polyphony can really exploit.
"And the other factor is that on PS3 we have an install base of 70 million units. On PS4 on launch day we'll have an install base of zero units. There'll be plenty of games to help drive PS4 - not least Drive Club in the racing genre from Evolution Studios, a studio with a fantastic pedigree."
Speaking earlier this month at the Gran Turismo 6 reveal event, series creator and Polyphony Digital CEO Kazunori Yamauchi said: "We actually do have a PlayStation 4 version in mind, but for this holiday season, we thought it would be best for users to release on PS3 for now."
Seemingly moving to settle any premature excitement, however, Yamauchi added: "I thought the best scenario would be to have the game come out, then to have new scenarios, new DLC and other updates. Once the players have thoroughly played out the system, if the PlayStation 4 version came out naturally, as part of that process, I think that would be the best scenario."
The original Gran Turismo launched in Japan in December 1997 before releasing globally the following year. Gran Turismo is Sony's best-selling franchise to date with unit sales of 70 million, almost half of which have been made in Europe.

http://www.computerandvideogames.com...n-ps3-not-ps4/