About the usefulness of this application the habits of the users will decide. For sure this app will provide some exercise at the working place, which mostly is a good thing.
Flyar by YDreams is a Twitter desktop client using augmented reality. This is not easy to explain by a few words, so the video below will provide further information. The app visualizes the tweets as birds on the desktop and uses gestures interpreted by a webcam for navigation. The messages are brought in by birds, which have different colors for common messages and responses. (s.a. Hiperia3D News)