@EvilGuy
Dude, I practically got my head chopped off by the Friendens for saying something like that in 2004. Welcome to 2010.
I still see where you're coming from. There have been Amiga window managers for Linux, but do you see them being prominantly used? Anubis is said to be sort of an in between, that is somewhat more palatable a solution, which is using the Linux kernal, but building the user experience up to be more closely Amiga-like. This gets you hardware support on par with Linux, but hopefully, without the bloat.
Look, probably the hardest part of AmigaOS4 is done, and it is just a matter of building it up, so there is no point for them going back to the scenario you mention.
Getting to x86 is still easier from where they are now than what you suggest. You have to remember that it would be very hard to drag the userbase over with what you suggest.
As for the future, the era of the OS will probably only run another decade, and then user experiences will be downloadable to a non-descript OS on any hardware over the internet practically instantaneously, and configured to your preferences. You could have an AmigaOS preference, with access to the same computing resources as any other. With the trend moving to internet based user experiences, and data rates increasing exponentially I see this as an inevitability. You may have low access or bandwidth right now, but do you really think it won't improve by the end of the decade.