Apple is making a bunch of changes in iOS 9 that will make your devices much more proactive.
For example, if you insert headphones into your iPhone, your device will now recognize the headphones and pull up a "Now Playing" screen instead of having you pull up your music every time you want to go on a run or get in the car.
Apple
Apple
But perhaps the coolest proactive feature is suggesting who an unknown caller is on your phone. Instead of just showing a mysterious number, Apple's new operating system will suggest who the caller might be.
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Apple says it does this all anonymously, so your data and personal information is never compromised or given to a third party.
Apple