A new product from hitachi, everyone will want some,
even you!

http://www.hitachi-chem.co.jp/english/pr...

Here is an aircraft app;
http://www.kingairshades.com/

Here it is again;
http://www.hawkerbeechcraft.com/rapid/im...

Here is the license holder of the patents (;^])
http://smartglass.com/

enjoy!