Possible? Yes! It would be possible on the PC aswell, but AFAIK dual G4's outperform the (much) cheaper PC-sollutions. I think it's due to Altivec or something...
It's not very likely, though; even though many people remember the Amiga-platform, most people consider it dead.
On the other hand: Who knows what the future will bring. If only someone makes a very special application and refuse to port it to any other platform... :-)
