No, you're wrong, all post-nubus ppc macs are not like Pcs at all. A PC has SSE software, but a g4 has an actual altivec FPU, A PC runs little endian, PPC runs big-endian AND little endian. A mac has OF, Pcs have BIOS. The differences go on.
Truth be told, a mac nowadays is a custom PC with EFI on a cheap FOXCONN Mobo.
And to date, the most populous Big-Endian archittecture is PPC, the 68k is VERY similar to a PPC. And as far as OCS/ECS/AGA goes, their relatives are the GPU, SPU and North/South Bridge chips in Macs and PCs, i wasn't focusibng on them.
@Paolone
AROS has promise, if you can get WARPOS/PUP support working I'd DL it for PPC, you won't rely on UAE to do it, will you? I like the three Amigoids Oses out there, tehy all have promise.
I have to say that PPC macs have more lifetime than any PC to a consumer. when SJ switched them to Intel, that went teh way of horse and buggy. I am neighbors with a couple who use a PowerMac G3 w/ one of those 450mhz ZIF G4s, it runs Tiger like new, a Core Duo Macbook at stock spec struggles with SL. My iBook g4 runs circles around my brother's Phenom 3Gb laptop, at 768mb and 1.33 Ghz at that, because it runs Micro$haft 7.
I use my G4 for:
DVD encoding
E-mail and web browsing, youtube, facebook
Gaming, the newest game I use is DOOM 3
iTunes music and 720p video (my P4 HT couldn't do 480p without slowdown)
ALL else I do on internet
My point is, I don't mind waiting two hours for 720p dvd5 video to be encoded, because I can browse, play Ut2004 and do whatever while I wait, if I encoded on my HT, it locked up the RAM so much i couldn't play even Half Life. I don't need 1080p video, 3GB/s transfers or UT3, because I don't care to be in the rat race to keep up. I'm happy with what i have, thank you