Here are the possibilities:
1) Apple will use an Intel chip alongside PPC so that certain Macs can run x86 code natively, with no emulation. This is somewhat reminiscent of the old PC compatibility card of the 90s.
2) The PowerPC specs are open. Intel could be developing a clone. Way too much of OS X relies upon AltiVec to totally ditch it. AltiVec specs, however, are not open; there's no reason they couldn't be reverse engineered though.
3) Apple really is switching to x86 as a primary CPU, but PPC will remain alongside x86 to ease the transition.
4) This is bullshit.
5) It's a misinformed rumor. Apple is releasing a PDA, tablet, or some other device utilizing an Intel CPU.
Notice the article said that they were considering it for low end machines. That would mean, if there's any truth to it at all, we'll be returning to fat binaries. Or consider this: Intel would develop a PPC CPU for low end machines like the mini with no altivec optimization. They could basically design souped up G3s at a lower price.
The likelihood of a complete architectural change is so slim. Granted, this wouldn't be quite as bad as when developers had to rewrite for OS X, recompiling for x86 and PPC would still be an annoyance, even if it were only a minor task.
And really, why would CNET have the latest Mac rumors ahead of all the other Mac sites who live for nothing else but this kind of stuff?