"Sony will launch its next generation home console when developers are unable to improve the games they make, a senior executive at the company has said.
When that happens, Sony will have to "seriously consider" launching the PlayStation 4, worldwide studios boss Shuhei Yoshida told Eurogamer.
"Looking at the platform cycle, when the platform becomes something game developers are not able to improve their creations with, that's the time we have to really seriously consider shifting to the next generation," Yoshida said.
While Microsoft is rumoured to be preparing to launch its new Xbox in 2013, we've heard little about Sony's next home console.
Sony has insisted its focus is on the PS3, which recently enjoyed a price cut, and the PS Vita, due out in Europe early next year."
When Sony will "seriously consider" PS4