I've wondered for years why nobody has ever bothered themselves to make photosensitive side and rear windows for cars, or for houses. Or make the window a greyscale LCD screen made up of nothing but on/off pixels, so that the user could choose whatever level of darkness he deemed appropriate.
The phone windows, mirror, refrigerator, Hell I want it all! I saw this video a couple of months ago so cool! seriously whats taking so long! No one has a home touch screen TV out to the extent of my knowledge (although I hear apple is working on one). This is awesome but seems like a long ways off!