OK. So, I was wrong... MacOSX 10.4.1 runs on Pentium 4 chips. The whole Stevenote was done on a Pentium 4, and nobody knew until he opened "About This Mac".
So Apple has a lot of work to do, undoing all the anti-Intel/Pentium marketing.
What about Altivec code?
Does this mean a Red Box windows compatibility layer is more feasible now?