Here's a gesture based OS animation, swiping from top brings up an app specific menu, swiping even more takes you back home. Swiping from the left side brings all apps, and shows the ones with some notifications, so it's a notification center too. Swiping from the right side takes you to the multitasking center. And swiping from the bottom brings up quick controls. You can have widgets and favorite apps on your homescreen, as well as a custom wallpaper, which reflects on the whole system. Also, notice how you can pin your favorite settings. Fancy stuff. And yes, I wrote GIF twice.
