Nokia’s showcasing new concepts at Demo House 2010 in Espoo, Finland. Here’s something from their press release.
The mobile radar demonstration shows how a mobile device can use an active radar sensor to measure speed and the direction of movement of approaching objects, just as traditional RADAR would. It uses electromagnetic waves to provide a different type of mobile wireless sensing.
This research concept could enable new ways for users to interact with their device, for example via gesture control. It also opens the door for the creation of radar based applications which could be used in sport, for entertainment or personal safety.
Looks like Batman had inside info on this project :D