We built this as a proof of concept of better touch input to the Oculus Rift. The current solutions for touch input are the Leap Motion and different types of mesh/gloves. We felt that a tablet touch screen is much more intuitive and much more prevalent than either of the other solutions and decided to build an Angry Birds clone on top of it. @alexisohanian and many others enjoyed our demo.
@rjvir The source for the Android app and the web server that serves the tablet data is here: https://github.com/awiss/webcam
On the Rift side, you just need to ping the server at / to get an array of the most recent swipes and gestures from the tablet or /rift to get the tablet's position with respect to the headset.
Valentine Roulette