This is what Google does. What you search is becoming a better and better predictor of what you will do. Most searches are based on future plans, purchase, or interests. They even know your current and future locations if you use google maps for directions. If you use gmail, Google can tell that you just broke up with your girlfriend, or are graduating college. Sidenote: we don't "give away" this information. We exch…
It is almost freaky when I go to type something I thought was obscure into the google search bar and it predicts what I am going to type after the first word. A less obscure example (but the only one I could think of) is when I type is "How to fix " and it correctly filled in "a leaky faucet". No context, but it guessed correctly.
Far spookier is the autocompletion for "a pair of pl".