After looking at Sony's financials for another post, I'm almost convinced they won't launch another console at all until 2014 or 2015. They're valued at $14b but have annual losses at $6.5b as of april. Kaz wants to use the PS division to help return the company to profitability. You don't do that by selling a new console at a loss. PS3 isn't going anywhere for a couple more years yet.
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