PPC is far from dead.
Mind you, the Cell processor of the PS3 is PPC based, (as well as the processor of the Xbox 360, which is essentially a slimmed down Cell processor).
And AFAIK a new Cell processor has been released very recently.
Sorry to disagree, but as a DESKTOP processor on a commercial scale, the PPC is, in fact, quite dead.
Commercially speaking, no one will run out and buy a sub 1ghz desktop machine when they can run out and buy a 3+ghz Intel or AMD for the same price.
Besides, neither Amiga nor Hyperion are building a game box like the wii or xbox, so your point in this conversation seems rather moot?
Wayne