Ultimately, search is not just the web but literally all of your information - your email, the things you care about, with your permission - this is personal search, for you and only for you.
The next step of search is doing this automatically. When I walk down the street, I want my smartphone to be doing searches constantly - 'did you know?', 'did you know?', 'did you know?', 'did you know?'.
Eric Schmidt, Google CEO