Have to agree with DyLucke, the PPC is far from dead and to be honest, if anything has to be put out of its misery, it's got to be the x86 (both 32- and 64-bit). The only thing that keep it from obsolescence is the bloatware called Winblows, the x86 need to be fast in order to run Winblows at an adequate speed. I'm damn sure the PPC would be a lot faster than it is today if Microshaft had kept supporting it after WinNT 4.0.
There! Now I have whacked a hornet's nest with a stick and set the ant-hill on fire.
Replace Windows NT with MacOS 9/X. Ex-DEC engineers at AMD and Intel would still beat IBM and Motorola/Freescale. PowerPC is competing against reincarnated DEC Alpha.