It was running on a PowerMac with a Pentium 4 inside it.
The BIOS, motherboard, RAM, drivers, I/O, and everything else is incompatible.
Right, but they're saying that there'll be a way to get Windows on their Macs. I guess I'm just under the assumption that somebody will do the same for Mac OS on PC. They're going to be facing the same obstacles. Just the other way around.
No, Windows has support for a wide-array of hardware. Mac OS X doesn't, and I'm sure Apple went out of their way to ensure that Mac OS X can't run on anything but their hardware.
Keep in mind, this changes nothing. It's been 5 years and they still haven't done it.