I think people would run OS4 (dont say 5...lets not get way to ahead of ourselves) on a x86 if it came out. I would. Not as a primary os but I would check it out. Same with MacOS...rumor has it, that it runs on a VMWare session ;-)
It would be COOLER to have OS4 on a Wii or P3 system because they dont have a OS you can boot into. Instant cash for the coderz at Hyperion.
-Alex