I wasn't meaning to sound like a Mac zealot. I use PCs a whole lot more (outside of home) than I do Macs, so I'm perfectly comfortable with them, and I quite often use Linux on my home PC and even on my Powerbook. The point of my post was that others had been claiming Macs were useless, and that's something a lot of PC users do without ever touching one. I was trying to show that they are, in fact, decent computers.
Of course people will run Windows computers, because there are a lot of things that PCs are better at. A "no-frills" PC is much cheaper, and that's what companies look for in office PCs. Hardcore CAD will be done on a PC (or Sun, or SGI or something) because the graphics card choice is much higher for a PC, a lot of film editing is done on a PC using Avid.
I do turn my PC on for more than gaming, because I quite often design using AutoCAD and Inventor, for which there are no Mac ports. Oh yeah, and I've got to update the antivirus (joke).
Until the Intel Macs and Bootcamp came out, I was going to build myself a PC for uni, because there will be Windows apps that I'll need to use as part of the course. It'd spent most of it's time running Ubuntu, but I'd have Windows when I needed it.
Like you, I'll use whatever platform I need, but I'm fed up with people bashing Macs (or any platform, for that matter. I've joined sides with the Windows people in arguments before) as useless.