Regarding the penultimate point about Apple’s pricing:
I always thought that Wintel boxes were so cheap because of the commodity markets of computer components. Motherboards, IDE drives, power supplies have all settled into standard formats and are just churned out by hundreds of different companies in Asia, and have to be extremely competitive on price. Apple components are not a commodity market, and have settled on prices accordingly.
Contrast that with laptops, which each is a custom design problem, that requires custom components (custom battery, heatsinks, wiring, motherboard). Both Wintel and Apple laptops fall under this consideration. So Wintel laptops don’t get a price advantage from commodity components, and Apple is able to compete pricing wise.