The Official Amiga moved to PPC a long time ago, and yes AOS4.x is the official amiga platform.
If you believe that then I expect you'll be buying the upcoming Commodore Amiga from CUSA, as it is the official Amiga.
But then if you believe what you wrote, you'll probably believe anything.
Look, I found the perfect soundtrack for you to listen to as you pretend OS4 is "teh REAL Amiga!":
http://www.metacafe.com/watch/sy-959746544/journey_dont_stop_believin_official_music_video/
