i think its possible that the ps3 was intended to skip a generation. Its at least semi upgradeable and sony likes the fact that they can make money late in the generation.
I for one appreciate the fact that sony supports their consoles for a long time because as a consumer it makes my purchase more valuable. MS just dumps console support and forces you to buy new stuff just like they do with operating systems.
I see ps4 coming out 2012 or so. Maybe it will be playstation beyond or something creative and not a number







