MorphOS is a very nice Amiga-like operating system that once upon a time could have become what is today known as AmigaOS.
Having actually tried a previous version of MorphOS I can say that it is an insanely fast, very, very slick improved Workbench on stereoids, just as with AmigaOS4.1 it has a compatibility layer with system friendly classic 68k applications and many ported applications known from the Amiga world.
MorphOS is constantly under development and lately the Amiga world got shocked by the incredible news of MorphOS running on the G4 Mac mini, judging by this thread at amiga.org initiated by Piru, world famous for creating short (as in very short) posts consisting of the word “no”, Powerbook G4 seems like the next step for MorphOS – the closest to a proper Amiga notebook the Amiga world will have.
But as usual in Amiga world, there is no definitive anwser, and no official roadmap when, where, how. But at least there is a video showing it off, maybe next year?