Each big idea like that is an operating system upgrade," she says, smiling. Comfortable territory. "Writers are responsible for some of it. They say Shakespeare invented the internal monologue."Oh, I am very familiar with the internal monologue."But I think the writers had their turn," she says, "and now it's programmers who get to upgrade the human operating system."I am definitely talking to a girl from Google. "So what's the next upgrade?""It's already happening," she says. "There are all these things you can do, and it's like you're in more than one place at one time, and it's totally normal. I mean, look around."I swivel my head, and I see what she wants me to see: dozens of people sitting at tiny tables, all learning into phones showing them places that don't exist and yet are somehow more interesting...