Of course there could be new old Amiga hardware. Somebody send Jeri Ellsworth an email, please.
The real Amiga is called UAE these days, imo. OS4 is interesting, but that's not enough when there is Linux, BSD, etc. around. These are interesting and free (as in speech, or beer, or what you want).
If hyperion released at least the kernel sources for free, then porting would just happen. Amiga OS could have a future as a lean and mean desktop system.
But if things stay as they are, then Amiga OS is only a quite expensive toy for die hard fans.