Does not include iPad
The scary thing for PC makers is that these figures DO NOT include iPad or iPod touch sales. (iPad and iPod touch both use the same chipset.)
The iPad is Apple's stealth nuclear option and the PC makers don't even realize it yet. The fact that the Mac keeps having one record quarter after another should have PC makers worried. The astonishing fact that the iPad will start outselling the Mac in less than a year should have them terrified. Add in the iPad/iPod touch sales to the Mac sales and suddenly Apple has locked up over 20% of the PC market. That is a huge seismic shift.
The iPad is what the Mac should have been