Heres's a speculative piece that uses the potential of electrochromic glass to produce interactive architectural facades. I've seen a few examples of this technology in privacy screens in offices and houses and I'm sure somewhere in Japan they have made a whole building facade out of this stuff but I can't remember where it was or what it was called so if anyone knows please get in touch .

dVitral

Developed for the IVAM facade, this un-built speculative installation would use a matrix of SmartGlass . Electrochromic glass capable of turning opaque when charged with current to create a dynamic interactive, low-resolution screen.