Good for the author, but the article leaves "MOM GET THE CAMERA!" impression.
>Then I just plugged the Pi into a USB power brick, and… it worked!
Might as well attach a diesel-fueled generator and a pentium 4 to the back of the desk.
The project seems like a perfect opportunity to play around with some arduino-like board. It could probably be embedded inside the control panel and powered from the desk itself.