Compact call interface for calls and a new Spotlight-like Search interface on iPad!
A new Scribble feature allowing you to automatically convert handwriting to text (like in the Apple Newton and Windows Tablet Edition) and drawn shapes to actual shapes (like in S Note).
New Chronograph watchface with a tachometer and a huge complication on the Large watchface.
Watchfaces can now be shared on iMessage and social media, and downloaded from websites and apps.
Sleep tracking and Wind Down mode for iOS and watchOS, to help with sleep.
You can now upgrade a temporary Sign in with Apple account to use your Apple ID instead, and apps will have to ask you to track you across apps and websites.
Adaptive lighting adjusts smart bulb color temperatures throughout the day, and face recognition in cameras will let you know who's at the door.
You can also pull up cameras on your Apple TV, and multi user support is now in Apple TV too.
Extensions in Safari are back, along with translation, a privacy report and a customizable start page.