Yes! That's what got me thinking as well. Apple briefly mentioned 'iOS in your car' when they announced iOS7 I believe. This will play a role. Tracking movement

Yes! That's what got me thinking as well. Apple briefly mentioned 'iOS in your car' when they announced iOS7 I believe. This will play a role. Tracking movement will become part of using a device. Think of surfacing information or starting background processes. Currently their Maps application switches view modes already. When you drive and park your car it switches to 'walking'. It would be great if there would be a way for developers to build in options and ask the user to 'start this app when I start driving'. This also accounts for Touch ID. Currently it's just for unlocking your phone. And more people in a family could unlock a device without sharing a code. On a usability level this also provides options; for example when I unlock my phone with my left thumb, open e-mail instantly. It's might not be novel, perhaps it's done before. But it sounds useful to me.