In fairness, we have been using Dells for our business for years, and we have several hundred of them. I wouldn't characterize them as junk.

Actually, Windows users are getting something OS X users aren't getting: malware. In addition, there are no viruses which affect OS X. That said, I much prefer Microsoft's approach to security compared to Apple's. Microsoft takes security seriously, Apple not so much.

Apple's hardware (desktop and laptop) sales amounted to 42% of its revenue according to the most recent annual report, but that report included hardly any iPhone revenue (for comparison, iPod sales were only $2B less than hardware sales). Jobs has to know that Apple is going to be out of the hardware business one day; he knows that OS X is the important part. Why else would Apple be deriving more revenue each year from software, services, iPod, and iPhone? He'll license the OS, but it may take a few more years until Mac hardware accounts for only 20% of revenue.