We have the problem of endianess
http://en.wikipedia.org/wiki/Endianness it is unlikely that amigaos will ever be ported to x86 and boot natively.That thing wont be an amiga.PPC can change the endianess
http://en.wikipedia.org/wiki/PowerPC#Endian_modes but i dont think it would be easy to port it to x86.So x86 is definitely out of the question for me.
Also from the same page Endianness and operating systems on architectures
Little-endian operating systems:
* Linux on x86, x64, Alpha and Itanium
* Mac OS X on x86, x64
* OpenVMS on VAX, Alpha and Itanium
* Solaris on x86, x64, PowerPC
* Tru64 UNIX on Alpha
* Windows on x86, x64 and Itanium
Big-endian operating systems:
* AIX on POWER
* AmigaOS on PowerPC and 680x0
* HP-UX on Itanium and PA-RISC
* Linux on MIPS, SPARC, PA-RISC, POWER, PowerPC, 680x0, ESA/390, and z/Architecture
* Mac OS on PowerPC and 680x0
* Mac OS X on PowerPC
* MVS and DOS/VSE on ESA/390, and z/VSE and z/OS on z/Architecture
* Solaris on SPARC
Amiga in both 680x0 and PowerPC is big endian while any x64 and x86 above is Little-endian