The relative paucity of switchers speaks to the power of Microsoft's monopoly more than anything else. Apple is probably just being realistic in its drive to increase marketshare. It will take a long time and a lot of insanely great products to make a dent. But I think it is clear that increased marketshare is Apple's goal and the switch to Intel, Bootcamp and all the other solutions they come out with to make Macs more interoperable are directed towards that. If they succeed, everyone will benefit. Competition is a good thing.
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