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Cringely is urging Apple to port OS X to intel. Although this idea keeps being brought up periodically by various people outside of Apple, it is never going to happen. The notebooks and iMac might still sell, but the pro machines - which is where the biggest margins are for Apple - would be utterly devastated. People don't buy those machines for how they look, they buy them for the Mac OS. Despite what Cringely thinks, these hypothetical intel boxes would be Macs if they were running OS X, and the pros would buy them like mad because they'd be much faster and much cheaper.
But the larger issue is with support. Apple has a great advantage in only having to support a very small hardware set. Windows has the basically impossible task of running on countless different manufacturers hardware. Just supporting all the video cards alone might be beyond Apple's ability. Getting a port working is one thing, making it stable across the entire range of possible hardware (including every single combination of all those pieces) is completely different.