It would have been a better article if the author would address if this item required energy input for operations.
http://www.inhabitat.com/2007/04/16/watair-turning-air-into-water/
Here is some computer graphics of the stuff. Interesting.
The structure can operate well enough using day/night variations. It would cool at night and collect dew in the morning as the air warms. No power requirement. It has to be very large to provide a significant amount of water.