Thanks, I stand corrected; he did mention the Internet. At that time, he was still expecting a walled-garden AOL-like model to win the day, and Microsoft was frantically trying to build MSN to take that market away from AOL, so he downplayed the WWW and the Internet. The review quotes in the Wikipedia article make it clear how shortsighted that was even with the information available at the time.

As for the original article here --- Yuan may have heard Gates talk inspiringly about the Internet, but certainly not in the 1980s, and only after Gates realized rather late that the Internet was a fait accompli.

You have confirmed GP's point. This link documents that Gates had underestimated the internet when the book was published in 1995.