Guess what? My sparkling mint 1.67GHz 17'' 1680x1050 PowerBook runs in circles around the hardware in the subject of this discussion. And what's more? In case it breaks, I can repair it on the spot, in the city I live in (and I've got several companies to chose from, even the official Apple service center). What else? It actually costed less than the new yet inferior (and unportable) hardware.
IMHO Apple hardware is the only target that makes sense for PowerPC MorphOS at the moment.