The missing campus puzzle

"I have another theory that I call the missing campus puzzle. When you drive down highway 101 through Silicon Valley, you pass the Oracle campus and then the Google campus and then the Cisco campus. And some people think, wow, they’re so big. But what I think is, I’ve been driving for close to an hour—why haven’t I passed a hundred more campuses? Why is there all this open space?"

-- Marc Andreesen in Wired Magazine