Know-it-all's who know absolutely nothing. I just finished the July Macworld (yes, I know, I'm behind on the times) last night, well this morning I should say, and the last column was talking about how Apple would lose tons of money and have to significantly reduce their size if they ported OS X to Intel's arkitekky.
Apple is a hardware company that builds their own OS to sell their hardware. They are not an OS company, they are a hardware company. The column said that something like 75% of their sales, almost $1.1 billion, was of computers, and another 15% was non-computer hardware like monitors and iPods. Only $160 million was from any software, including the OS. If you could buy OS X on cheap PC hardware, you would have no reason to buy from Apple, and they would lose that billion dollars, closing the Apple stores and hindering their innovation.