Sony has appended a "Holiday 2011" release date to its next-generation portable system (codename: NGP), but hasn't offered a timetable for individual regions. Will it be a worldwide launch? Sony Computer Entertainment America CEO Jack Tretton didn't provide an answer in his interview with Engadget, opting to pin Sony's strategy on providence.

"I know that's rather ambiguous, and that's for a reason," Tretton said. "I think our goal is always to launch holidays when the majority of sales are done. You want to have a worldwide simultaneous launch. Having said that, this'll be our sixth platform launch, and it's very difficult to have the quantities to be able to launch on a worldwide basis on the same date." Tretton noted that the goal might overshoot reality -- leading him to pare down the initial promise. "I think our goal is, we would get at least one territory out by the end of holiday 2011."

A clearer plan should become visible by fall, well after unforeseen production challenges have been dealt with. Tretton added that Sony had its challenging experience with PlayStation 3 to inform the NGP's road to mass production. "I think we'd look to avoid repeating that, but when you're dealing with new technology there are always roadblocks."

This article was originally published on Joystiq.