I think the biggest problem with AROS has always been that they were trying to build AmigaOS for x86 platforms, when everyone was already building upon the PPC.
The move to PowerPC was announced in 1995, the same year as AROS started, and the Amiga PPC hardware wasn't launched until 1997 (IIRC), so the momentum for the PowerPC wasn't there yet.
Besides this, it's a common misconception that AROS = x86 Amiga. This is not the case. AROS was designed from the very outset to be platform agnostic, the x86 port just developed quicker than the others (for various reasons). For example, before Jason and Toni started working on AROS 68k there was work done to port AROS to 68k Amigas, though the port wasn't maintained for a number of years (apart from AfAOS). If potential AROS developers were interested in using PowerPC, they would have been free to do so, so this PowerPC argument doesn't really hold up, sorry!

I had waited many years for something like the Firebee to be released, but really, there are just better applications / games for the Amiga. There just needs to be new hardware. I'm definitely going to be getting a Natami when it's released. Especially since AROS 68k is looking mighty fine. It will be awesome to actually have an Open Source AmigaOS that works just as well as the original, and is far easier to set up than the plethora of patches one needs today to get some 'modern' functionality.
I think the Natami is going to be a fantastic system for Amiga fans, and AROS + Natami should prove to be a great combination.
I just hope someone gets a supported browser for it. Open Source doesn't always help though, look at the mess that is AWeb, it's open source, but people who have looked at the code ran away.
An open-source licence doesn't guarantee someone will work on the software, but a closed-source licence doesn't guarantee that either. However, the advantage of open-source in this regard is that at least there's a chance of new developers improving the software if the earlier developer(s) are no longer interested in doing so. With closed source software, that chance is lost.
With regards to a web browser, there have been a few attempts to port AROS OWB to AROS 68k. This post links to the most recent attempt I know about:
http://aros-exec.org/modules/newbb/viewtopic.php?post_id=61875#forumpost61875