It's all about the OS. In fact the whole reason macs work so well is because the OS is tied up firmly with the hardware inside the box. The software is written for specific apple spec'd hardware. Where as windose is expected to deal with shitty hardware from uncle tom cobbly, and back street computer makers inc. Also the apple design ethos runs very very deep. The os came first, it pioneered HCI and the GUI, and that has always been apples thing, usability. It's sheer market forces, and poor processor speeds that IBM could achieve, that are making them make macs run windows. You'll get the design savvy who will always choose mac os over windows (and apple knows this), because microsoft are still way behind. In the creative realm, design specifically, macs will still rule the roost, because the design of os x is far more refined, and to designers across the spectrum, from architects to graphic designers this is key to their own identity. Apple would never ditch an industry that has supported them from the outset.