1) iMessage: you can now transfer money via Apple Pay, and now messages will auto sync across all devices.
2) You can now type to Siri. Sometimes she can’t understand you and so you can type a command.
3) A new Control Panel: drag and drop apps for shortcuts, transfer info and files easily and more on a new portal.
4) Driving Mode: you can put your phone on Do Not Disturb for messages and texts easily while driving.
5) Make Animations with Live Photo: use your camera to record a clip and export an animation (gif) for social media and such.