PS4 in 18 months?

[JEMC]

There are reasons to go one way or the other, but I think it's reasonable to think that PS4 will not come until Microsoft launches the nextbox, which in turn depends on how well Nintendo's WiiU performs.

If WiiU (which will probably be out in Fall 2012, ready for Xmas) performs well and turns into a threat for the Xbox360, Microsoft will announce a new console at E3 2013 and launch it later that year (Xmas 2013). And Xmas 2013 is aprox 18 months from now.

So the question here is if Sony also sees the WiiU as a menace, and does the same as Microsoft (meaning PS4 in 18 months) or not and waits 1 more year.