I've been reading Slashdot for years, and your post is one of the best I've ever read. You are right on in so many ways. I don't think I can say it better than you did, so I'll just say from my own experience, your're dead right.
I'm an electrical engineer, and I work with computers all the time, but I still don't have any desire to mess with firewalls and anti-spyware programs on my home machines. After complete frustration with adware bringing both my home Windows boxes to their knees, I bought a Powerbook G4 about a year ago. No problems with it since then--all I do is run software update when it asks me to. When I wanted to buy my 15 year-old daughter a notebook computer for Christmas, I compared Windows boxes to the Apples, and guess what, the iBook G4 was actually cheaper than comparably equipped Windows boxes, so I bought one. She's been happy with it for over a month, and rarely has any questions about it.
I don't work for Apple, but I'm seriously thinking about buying some Apple stock. All the adware/virus issues with Windows, coupled with the iPOD's success and the new $499 Mac and Apple could really start kicking some A$$ in this market.
But again, great post. You are the man! (Assuming you're a guy.)