This is how it will work:
It is not a 68000 emu, it is a whole Amiga emulation (that would necessite to run a full 68k OS to run applications).
That full 68k OS would be AROS itself, in a modified (let's say "crippled") form, so that most of the API would simply redirect to the ones of the "real" AROS. This is the only way to achieve transparent emulation on a machine with different endianess.
I think "me" was asking about a 68000 emu like the one in MorphOS that make possible to use the 68k apps directly on the native OS.
That is not possible on x86, for instance, and it makes no sense to duplicate the efforts: the UAE approach would work with any CPU.
That would definitely increase AROS userbase but there are problems involved in such a situation:- How hard/long to make a portable 68k emulator ?
There are many issues, as said, which make it impossible to have such a portable 68k emulator: if you want portability, you need to run 68k tasks in a box of its own.