This is a live demonstration of the free PAARC (phone as a remote control) library you can find on CodePlex (paarc.codeplex.com). It shows one of the included sample applications that allows you to remotely control your desktop PC using a Windows Phone as input device.

Sorry for the blurry image quality and lack of details - but the video still succeeds to demonstrate how smoothly the data is transferred in almost realtime and that this creates a very responsive user experience. If you like the demo and want to integrate the library in your own projects, you can find more details and documentation on the above mentioned CodePlex page.