iPhone 5s Burst Mode
The burst feature on the iPhone 5s is really cool, it takes 10 rapid pictures per second for 100 seconds. This is useful when you have a subject that may not stay straight. Got a Toddler? Trust me, you'll want to use this - a lot.
After you take your pictures, you'll get an opportunity to 'favor' the picture that you want to keep and delete the rest. Which means you can finally capture the moment when your subject doesn't blink.
What's really cool is that the pictures are all 8mb! Other cameras will downgrade the quality, but not on the iPhone 5s. Each picture is the same quality as if you just took the picture regually.
Learn more about the new iPhone 5s camera features.