I'm going to be blunt about this. Sit down, take a deep breath: Amiga has no future. PPC is as much a dead end arch (as far as the desktop goes) as 68k is. AROS will probably carry on thanks to it being OSS, but really, it's time as anything other than a hobby machine for people who grew up with it and those handful with a retro fetish is long gone.
Who said they should? But perhaps rather than trying to break out "new future" Amigas, we should enjoy using them in the same way people enjoy classic cars.
In know you say that perhaps we should enjoy our Amigas the way people enjoy classic cars,which up to a point is fair comment, but in the same breath you say the Amiga has no future. If the Amiga has no future then why do Hyperion continue to develop OS 4.X, or A-eon develop the X1000, or why is the Natami or the Minimig still being developed, not to mention Aros and all the other people working on other projects continue to do so.
For the simple reason no matter what the size of the user base the Amiga is far from dead and will continue in one form or another for many years to come. If you have such a pessimistic outlook on the Amiga why do you bother with the Amiga at all.
Since Commodore went belly up in 94 and all the crap that has happened in the years since, the Amiga community and those still developing in one way or another for it have proven all those pessimists wrong. There can't be many other computer systems (if any) that so long after the last machine rolled of the production line still has folk developing for it and a never ending enthusiasm for it such as the Amiga community has shown.
I just find it difficult to understand why someone like yourself who's past has shown such a great passion for the Amiga feels now that the Amiga has no future at all...