The Amiga is effectively dead,If by alive you mean "to take over the world" and take the position that windows have now, you are right. But by my definition AmigaOS will be alive as long as there are users that are still using it, developers that still develop etc.
If I can browse (most of the sites that I m visiting regularly work fine with amiga browsers), take my e-mail, chat, listen to mp3, watch divx and dvds, program in C++, write and print documents, read pdf books etc that is if I can do what I do in my everyday computing, for me will be alive just as FreeBSD or BeOS etc are.
1.3? ... who needs that when there is
Aros?