x86 is an arse to program for compared to PPC.
The more important issue though is whether it is an open or closed system.
Even if they did change to x86, I have no doubt that Amino would "do an Apple" and only let AmigaOS run on THEIR x86 box. Which they will make a few thousand of and then stop. Just as they have done with PPC.
I can't wait for Amino to go broke so tha Amiga can be free to run on generic hardware. This, or an AmigaOne emulator for x86 systems, are the only viable ways forward I can see.
