has anyone seen those windows you put on houses that lighten or darken the tint by a touch of a nob? I don't remember what they are called, but I saw it on a comertial once. I wonder if its posible to put those on a car! that would be awsome, has anyone ever thought about that?

oh I just found it, they are called smart windows! check it out!http://electronics.howstuffworks.com/smart-window.htm
tell what you think!