Every platform has a "Killer App". This is the application software that drives the sales of the hardware more than any other application available for that platform.
For the Apple ][, it was Visicalc, for the IBM PC it was Lotus 1-2-3, for the XBox it was Halo.
Well yesterday sees the release of the Windows Phone 7 Killer App. This application will change your life and make the platform sell like nothing every seen before.
The following video demonstrates the application in action. Check it out:
For more information see this post on the Channel 9 MSDN side.