It's going to look kind of bad, though, to have Apple's flagship desktop, the Power Mac, (potentially) being the only Mac left using PPC processors for a few months.
I'm really hoping that Apple will soup up the iMac with a quad version. I've always been an all-in-one Mac user, and I don't really want to buy a PowerMac with a separate monitor. The iMac G5 is the perfect configuration for me. As nice as the 2.1Ghz model is, I could really use some massively serious horsepower behind the screen, without having to spend a small fortune on a PowerMac.
An iMac Intel duo-core x 2 (quad) each accessing 5GB of memory (total 10GB) with a comparably quick front end bus would be an attractive machine indeed. Space and cooling constraints might be a problem, but if anyone can pull it off Apple can.
Of course Intel might unveil some significantly more powerful chips rendering a quad configuration unnecessary. By the time all apps have been converted to Universal Binary, who knows what Apple and Intel will have cooked up.
In the meantime I'm pretty content with this latest, greatest version of the iMac G5.