I saw similar booths in the Munich airport a few years ago, where they were called "NapCab". I had had a rough overnight flight and a messy transfer in Heathrow, a six hour layover in Munich, and of course server problems came up while I was in the air - so a small private room with calm lighting, power, and an internet connection was a godsend.

It worked with a credit card and cost (IIRC) about 15 euros per hour (10 euros/hr in the evening). There was a touch-screen for setting lighting, audio environment, and a wake-up alarm. It also had a bottle opener and a bottle of water. When you're finished, I gather that janitorial staff are notified and the NapCab is cleaned up and restocked for the next person.

Their website doesn't seem to be active anymore, so maybe the company didn't succeed - but here's a not-very-good picture of what mine looked like:

http://www.flickr.com/photos/26099052@N03/4733241817/in/set-...