One of the most impressive new features that Apple introduced with the iPhone 6s is the new Live Photos functionality.
It's not that Live Photos is a brand new idea per se, but it is the way Apple has seamlessly integrated it in the stock camera experience that really makes a difference this time around.
Not a brand new idea, but this time, it's done right
What Live Photos does (if enabled) is create a short, fast-motion video of the moment right before you take a picture and you get a short preview of that Live Photo as you browse the images. You can also 3D touch a photo to play the full animation and you can even use it as a live wallpaper of sorts on your lock screen.
Take a look at how elegant it's all implemented in the video above.
Things that are NOT allowed: