"Welcome to the party" - Jack Tretton

Jack Tretton, the CEO and president of SCEA, asked by Forbes when will they start to talk about Playstation 4. Tretton responded:

PlayStation 3 is really just hitting its stride. And technologically, I don’t think it’s possible to provide any advancement beyond what we have. What we’ve seen from the competition is
trying to add features that already exist in PlayStation 3. We invested heavily in that, we rolled a very heavy rock up a steep hill, through the launch period. But now I think that all pays off, and we’ve got a long run way behind it. So, I wouldn’t look for any discussion of a next generation PlayStation for quite some time.
I think there’s ground to be carved out for everybody. But I didn’t see anything about Nintendo’s announcement that said ‘Oh, we’d better get working on rolling out a new PlayStation here pretty soon.’
Our attitude is kind of ‘welcome to the party.’ If you’re looking at being a multimedia entertainment device, if you’re looking at high def gaming, that was 2006 for us.

He aims at Nintendo's next console, the Wii U, and welcomes it to the party and saying that the advancement of Wii U is what the PS3 has, referring to its HD graphics. And for Sony, Vita uses touch screen, which also DS has, and PS3 got Move, where Wii also has.