You haven't been paying much attention, Bruce, have you? It's all about market share. Windows still has a 90+ percent market share, and a bunch of stupid Mac commercials and everyone owning an iPod doesn't change that fact.
Oh, and someone broke into a Macbook Air in two minutes at a competition. Google it. "Macs are stable" PSSH. It's a computer like any other, and therefore susceptible to attackers.