t may well be that modern x86 chips are too hot and power hungry for console boxes. But I'm jumping to conclusions. If consoles did jump to PPC it would be great news for AmigaONE and Pegasos boards.
Well the Nintendo Game Cube already uses a PowerPC chip and Sony with Toshiba and IBM are currently developing a future PowerPC chip for the PS3. I guess Microsoft must have seen something nice about the PowerPC. Of course add the x86 future with Intel being questionable, seems to make it seem more realistic.