NeverWet is so 2013. The next big spray-on coating, developed by a federally-funded team working on smart windows, will use electrical currents to actually stop heat—and light—from passing through your windows. Besides being a remarkable feat of engineering, the invention could save us billions of dollars a year in energy costs.
http://gizmodo.com/this-spray-on-chemical-could-make-window-blinds-obsolet-1151111477
via Gizmodo