Don't get me wrong, because I like what AROS has accomplished, but AROS suffers from the same issue all open source software does: it gets updated when it gets updated (no schedule and rocking). Which is why I'd like to see a professionally supported AmigaOS derivative. Personally, I don't care if it's AOS4 or MorphOS, but cheap affordable hardware is all that matters anymore, especially if you want to grow your base.
Regarding the endianess and emulation issues... that's like me worrying about whether or not my car is slant/straight or V. I don't care. I just want it to get me down the road. 
well, open source doesnt mean you cant have dedicated resources behind it. If a company put some weight behind AROS development, it'd do as fine as anything else.
Team up with a few small suppliers of PC hardware to produce more ready to go systems like the imica and you have a nice little setup for hobby guys