My prediction has always been PS4 coming out last of the three, with Nintendo 6 and Xbox 3 coming out in a photo finish against one another.
In Sony's case, they care more about money and will want to optimize their PS3 investments, and there's going to be less pressure to jump immediately into the next generation technoligically. Microsoft needs to do it for rebranding purposes (if they ever want to seriously contend for expanded market action), and problems in Japan are going to force Nintendo to move by the end of 2011
But the next Xbox isn't going to be that much stronger than what we have. 4 GB of system RAM at absolute most, for instance, so there will be the possibility that next-gen games will at least be scalable to PS360 levels, at least.
Monster Hunter: pissing me off since 2010.
