Nearly a decade ago, just a few months after Microsoft shipped Windows 95, I asked Bill Gates if it was a conscious decision in the development of that product to give Windows more of a Mac look and feel. Of course I knew he'd say it wasn't, but I couldn't resist asking. "There was no goal even to compete with Macintosh," Gates proclaimed. "We don't even think of Macintosh as a competitor." That was a crock, so I pressed the issue a little. I asked him how he accounted for the widespread perception that Windows 95 looked a lot like...