AmigaOS and its hardwares have already contributed so much in the whole computer industry and consumers. I admit that I did not grow during "the Amiga era" but there are streams of young people who are interested in Amiga because we see a very bleak impression on [cough, cough] M*cr*s*ft and willing to look into alternatives.
Anyway, I think Amiga will still survive in some forms or another. Perhaps the open source software and hardware movement will maintain Classical Amiga's legacy. Maybe some other company will make an operating system that has very much similarity with Classic Amiga with updated standards. I don't know but as long as we respect Amiga we will preserve Amiga.