IIRC the early episodes of Babylon 5 had their graphics done on an Amiga using a product called the Video Toaster (I recall this from readong a magazine interview from Wil Weaton - how sad am I? ).
I'd love to see a more hetrogenous computing environment. It would be great to see Amiga OS 4 have some success. I imagine there are a lot of nostalgic Amiga users out there, and most of them will have jobs so probably can splash out on one of the PPC boards.
It'll be interesting to see how it does. There are now quite a few alternative OS projects that are making progress, it's just that no one is gaining more mindshare. Certainly I doubt they'll be able to knock the computer==Windows out the mind of the general populous. Ah well. Best of luck to them, and here's to cheap PPC hardware, which might make PPC Linux a bit more popular too (I love ARM assembly, I love PPC assembly even more - ny architecture that has an instruction called eieio is fine in my mind )