1. Redesigned from the ground up
Google says Android 3.0 has been completely redesigned with a new UI theme it calls "holographic." Every app and system view in Android 3.0 will have a system bar at the bottom of the screen similar to the notification area in the Windows 7 taskbar. Google's system bar gives quick access to things such as system notifications, system status, and navigation buttons. When you watch a video, the status bar will go into lights-out mode for full-screen viewing. Applications will use something called an action bar (not pictured) at the top of the screen for application-specific functions, such as navigation and menu options.