Sadly AROS suffers from the decision of not maintaining binary compatibility, nor having a m68k emulation integrated from the start. This means that no existing amiga software can run, except under UAE (and no, it is not trivial to integrate UAE to AROS).
Even though amiga software is really old and mostly outdated, it still beats having no software at all (or having even more crippled replacement).
IMO any attempt to obtain full binary compatibility after the fact are pretty much doomed, or at least it amounts to such a huge workload and rewrites that it can be expected to take 5++ years easily.
Don't get me wrong, I appreciate what AROS guys are doing, and indeed I also appreciate anyone writing native AROS software. I just feel that it's pretty much reinventing the wheel. Instead of focusing in providing the simplest tools the development could focus on more intersting areas.
So I can't see AROS as "future Amiga", at least not in the current state. In fact I would go even as far as declaring that WinUAE has more potential for that.