I'm hoping that pretty much what you've described will eventually happen. For right now though I'm going to give Amiga Inc. the benefit of the doubt. I believe Amiga and Hyperion need the current license to protect themselves. I would think it irresponsible of Amiga/Hyperion to not insure that a hardware vendors products designed and licensed to run Amiga OS will support Amiga OS. I also don't think it utterly unreasonable for Amiga Inc. to ask a hardware vendor, initially, to bundle AOS with their hardware product.
I expect that by AOS version 4.5-4.6 Amiga/Hyperion will include support for non-Amiga branded hardware with OEM licensed copies of Amiga OS with hardware dongle. By AOS version 4.7-4.8 there should be a retail copy that allows users to install AOS on any PPC hardware meeting the "zico" spec with or without hardware dongle.
If Amiga OS 5 is the AA/DE enabled version of AOS (who knows, we may not see AA/DE integration 'til 6.0, 7.0, 8.0, 9.0, or X - diez - 0x000A - 1010, or whatever). Then I suspect x.0 will have full PPC support, partial (beta) X86 support, experimental (post-alpha/pre-beta) MIPS, SH4 and StrongARM support. Later revisions would of course providing greater support based on which CPU platforms are in most demand...
If this doesn't come to pass and Amiga Inc. shows no signs of relaxing their license(s). Then I'll sign a petition, join a mail campaign, or whatever it takes to make Amiga Inc. change its license.