I think the days of a proprietary/semi-proprietary hardware platform are long gone. There's certainly no room for CPU evangelism in todays market, people just want it to work fast and affordably.
If the AROS team can integrate classic hardware emulation, combined with a modern web suite, then AROS will always have a place on my HD.
Commercially, it'd be nice to see an A500 in a joystick at some point, and if Hyperion can get it together to port OS4 to cheap hardware, then I'd probably be up for converting an old PC to an OS4 box, though I wonder if OS4 is still relevant with AROS and UAE both open and freely available?