You have three sets of users:
1) Guys who already bought AOS4
2) Guys who haven't yet bought AOS4 because they don't have where do run it
3) Guys who will never ever buy AOS4 no matter what.
If you release that QEMU or make AOS4 compatible with something cheap (like old Powermacs), you'll for sure increase piracy on group 3. You would most probably find several versions of AOS4 on torrents all around internet, but, those would never buy it anyway.
On the other way, you'll allow the second group, to spend their money in order to both play with AOS4 and also support the developers...
I can't see a loss relation outside the crappy hardware vendors...
*PS* Look!
http://www.newegg.com/Product/Product.aspx?Item=N82E16883227126RIt's cheaper than an incomplete Sam440ep combo!!!! :idea: