There's no way PS4 is coming in 2013

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Okay, I guess it's not so much "Sony can't afford a PS4 in 2013," but rather why would they take a loss when they could just ride the PS3 and profit?

The Wii U being (apparently) current gen level hardware power-wise suggests it won't occupy he same kind of niche as the next Xbox an PS, and hence won't clash with them enough to really be a threat. In other words, Nintendo getting a head start won't damage Sony or Microsoft because I doubt core gamers will buy a Wii U INSTEAD OF a PS4/720. (As well as, but not instead of)