The new M7 coprocessor is like a sidekick to the A7 chip. It’s designed specifically to measure motion data from the accelerometer, gyroscope, and compass — a task that would normally fall to the A7 chip. But M7 is much more efficient at it. Now fitness apps that track physical activity can access that data from the M7 coprocessor without constantly engaging the A7 chip. So they require less battery power.
M7 knows when you’re walking, running, or even driving. For example, Maps switches from driving to walking turn-by-turn navigation if, say, you park and continue on foot.
Later in the article they mention always knowing where your car is, and giving you guidance when you get back close to it. I expect this type of thing from Apple, and I’m happy to see they’re still thinking about human features from the human experience perspective rather than the feature perspective.
They really focused on this during the recent iPhone launch, and I was happy to hear it expressed so explicitly.