From the Gmail Blog:
When we built Gmail, we wanted to bring that same great search experience Google is known for to email. And today, we are making that experience even better by improving the autocomplete predictions you see when you search in Gmail.
Now when you type something into the Gmail search box, the autocomplete predictions will be tailored to the content in your email, so you can save time and get the information you want faster than ever before. For example, you might now get lax reservation or lax united as predictions after typing “lax” if you have received an email with a flight confirmation for your trip to Los Angeles in your inbox recently.
