As Siri starts responding to us from new and different devices, I think she could even start predicting what information we need next, a la Google Now. Passbook does this a little bit already, bringing up your boarding pass when you get to the airport, or surfacing your Starbucks gift card whenever you're nearby. CarPlay does a little bit too: If you drive from your office to your house at around 6pm every weekday, CarPlay will learn that pattern and offer that route to you before you have to ask for it.
Once I start using Siri across my Mac, iOS devices, car, and Apple Watch, certainly she could learn enough about my patterns to remind me when it's time to leave for a meeting across town, or send a note to my iPhone offering to update software on my Mac when she can see I'm not using it.
What do you think Apple should clean up in iOS 9?
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