Apple iOS 9 promises a more proactive Siri

Apple promises that Siri will be an even better virtual assistant. Siri will be more proactive - akin to what Google already does with Google Now and has plans to do with the upcoming Now on Tap feature.

For instance, when a call from an unfamiliar number comes in, Siri will look through your email and give you an indication of who that might be. Siri will also give you reminders to leave for meetings, factoring in current traffic.

Siri can also handle more complex requests, such as ones to show you all photos from a particular place and time.

The responses are context and device sensitive - so what Siri gives you to listen when you're out for a run might be different from when you enter a car.