One other point, and not to be made to bash AROS, but rather to point out a reality.
Amiga apps and games will NEVER be compatible with AROS unless re-written and obviously only a small percent of those programs will ever get re-written. That being so, AROS (in regards to the retro Amiga experience), must and can only take place via emulation. Thus AROS's main highlight is the fact that it is a means to emulate Amiga within an Amiga like environment, free of the presence of Linux or Windows. That's my current attraction.
MorphOS on the other hand, can run MANY Amiga programs without emulation, and at speeds that far surpass emulation speeds even on high end AROS compatible hardware. This is an edge that AROS will not have until PC hardware begins to make giant strides in speed at an affordable (disposable) price. Though, for the time being, AROS does have the JIT edge, which MorphOS currently suffers without for it really needs it to be able to play that pile of software which can not be run natively under MorphOS. Of course JIT is being ported to PPC so time will change all...
As for me, I like to play with what ever I can afford, and I personally can not wait for the Natami!