watchOS 3.0 promises faster app loads, better navigation, and more
Ars Technica 2016-06-13

Today at Apple's annual Worldwide Developers Conference, the company announced watchOS 3, the latest version of its operating system for the Apple Watch. Apple's main focus with this watchOS update is to make the device easier and more intuitive to use.
Faster and more “familiar”
First, Apple's Kevin Lynch showed off how much faster watchOS 3 is compared to the previous version. Watch apps now launch instantly instead of taking a few seconds to load. Overall, watchOS 3 is about seven times faster than watchOS 2, which should make all activity on the watch more seamless. The OS update will also allow background app updates, which adds to increased speed and efficiency of the entire system.
Apple added a number of UI updates to the OS to make it more "familiar" and easier to use. There's a new dock where you can get information from your favorite apps without fully opening them, and a Control Center can be accessed by swiping up from the bottom of the Watch's display. When it comes to texts, you can now see "smart replies" on the display as well, so you can choose a quick reply to send to someone.