The new N9 is the first smartphone running on the Linux-based MeeGo operating system, jointly developed by Intel and Nokia. It uses a brand new interface design that uses a lot of swipe based gestures. The homescreen has three panels that you can swipe through. The first is Applications, where you will find all your installed apps. The second is events where you have all your notifications and messages from social networking websites on one screen and third is where you will find all the open applications in a grid of windows. You can pinch and zoom to select the number of applications you see at a time and then tap on one to jump right back to where you left off.
Source: Nokia N9 announced, based on the MeeGo platform - GSMArena.com news
Here is Video you may see as Intro :
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