Of all the upcoming iOS 9 features for the iPhone and iPad, the biggest updates are coming to Siri
Siri is going to become "proactive," predicting what you want to know before you even ask it. It's a feature similar to Google Now or Microsoft's Cortana.
The new, proactive Siri will display relevant information based on your location, search history, emails, calendar and habits.
For example, the new Siri will look at your calendar and tell you when it's time to leave for your next appointment based on traffic data. It can search through your email to identify phone numbers that you don't recognize. And it can suggest apps to use and places to visit based on the time of day.
