> Let's not look what *might* be possible, but rather use what is
> available now. And currently Apple G4s are the better target
> (port done, cheap, powerful enough) than a PS3.

If "port done" was a valid aspect for evaluating potential target platforms for MorphOS then we'd still be stuck with MorphOS for PowerUP hardware at best ;-)
Regarding "cheap": Currently, the PS3 starts new at 240 EUR (with games) or 295 EUR (without games) in the EU.
Regarding "powerful enough": Yes, a new 1.6 GHz G4 processor upgrade for the PowerMac G4 starts at (converted) 113 EUR currently, which leaves 127 EUR for a used PowerMac G4. That's assuming the 3.2 GHz Cell PPE is about as powerful as a 1.6 GHz G4, which is just an estimation from my side.