Linus Torvalds: ARM has a lot to learn from the PC :
"I think ARM is a very promising platform," he said. "At the same time, the ARM community has never had the notion of a standard platform. ARM never had the PC."
In a way, they themselves started becoming a manufacturer of "IBM compatibles", they just locked their OS to them.
A Jobs-less alternate Apple universe might've been interesting though. He both canned the licensed Apple clones and made OpenStep into the next major MacOS revision. If Copland would've been OS 8 or BeOS as OS X, there could be viable clones, and thus maybe enough critical mass to keep PowerPC alive a bit longer.