Well the reason computers like Amiga and MAc were using the 68k is because it was a better processor in many respects to the x86. If the situations had been reversed and IBM were using the 68k in their PC clones, I don't think this would have affected the decisions of other companies and the x86 would surley have had a similar future to the Z80.
It would have been interesting to see how far the 68k would have been pushed, e.g. if the 040 = 486 and 060 - pentium, we would be on some sort of 3GHz 68090 by now.
PCC would have turned up much later as a server processor, like the intel itanium.
Its always funny to think how far people can push things. A not so great chip like the 8086 pushed to the P4s we have today, or making faster and faster F1 cars with all the restrictions that have been placed upon them.
A more interesting line of though though is what would the world be like if Commodore has made the Amiga architecture open. And rather than PC compatibles we had Amiga compatibles.
Microsoft would have no place in the OS market as the dominant os would be something like AmigaOSX.
All in all I think the world would be further ahead. If the amiga could do in 1992 with OS3 what XP still struggles with in some respects, imagine what it would be like now.
Of course there is also the possiblity that with some decent marketing Amiga could realistically be as or more popular than Mac just now.
But such is the way of things. :-(
