Apple may have released an ad suggesting that Windows computing . But serious computer gaming remains a seriously Windows-centric medium, with many major games making it to OS X only after much of the excitement has died down...or not to OS X at all. And it's Windows machines that are most at home in an entertainment center, with features like , Microsoft's , and HDMI output. (Apple wants you to put an Apple TV in your living room, not a Mac, and it still can't do everything that Windows Media Center can.)

I seethe a little just thinking about it, but some Web sites still work properly only in Internet Explorer. Take, for instance, the one belonging to my health-insurance administrator, which --it's so archaic that it still has a "Download Internet Explorer 6.0 Now!" button on its home page. And even Intuit, which sells Mac versions of QuickBooks and TurboTax, hasn't gotten around to making run on anything other than Windows. As ridiculous as it all is, there are times when I'm glad--or at least relieved--that I'm able to fire up a Windows PC to get to a site that doesn't seem to want the business of Mac users.

Got other arguments for giving Microsoft your business? I'd love to hear about them in comments below. And for the case against Windows, check out .

Harry McCracken, the former editor of PC World, now blogs at .