Well, unless Sony has revised their position, the PS3 acutally has a 10 year life span, whle Wii and Xbox 360 have a 5 year lifespan. This is in my opinion where the PS3 / Sony, in terms of their market share in the console market, have messed up.
The price o ftechnology will come down exponentially in the futer adn in five years, Nintendo will be able to bring out a new console, much mor epowerful than the PS3 and again start making a profi ton each console from day one. Sony on the other hand MAY not have gotten what they feel to their monies worht out of a console that cost an arm and a legg for them to develop. We'll see in four or so years what happens. I have little ddoubt that Nintendo will bring a new console out, the gamecube came out five years after the N64, and wii came five years after the gamecube.... BUT more importnantyl, I think its time for a next gen handheld... u can bet yourr bottom dollar that my name will be on the preordre list