People keep on about the OS4 dongle, but when you think about it, even without the "dongle code" OS4 is still tied to certain hardware. How? Drivers.
When you think about it, the only reason Windows appears to be able to run on any X86 board is because Windows has basic drivers for most motherboard hardware, ether by themselfes or supplied by the H/W manufacture.
Unless someone makes a board that is identical in everyway to Eytech's AmigaONE, OS4 still wouldn't run on it. Unless either they make the drivers or Hyperion do.
I am not saying the dongle is a good idea or a bad one (although I do think companies do have a right to protect their time and effort), but given the very few PPC mobos around at the moment (that average Joe can buy) it is hardly worth worrying about. And as someone said, Apple seem to be doing resonable well in a closed h/w market, why can't we too? Time will tell. ;-)