Scientists at Philips Research are currently progressing towards the development of transparent OLEDs. Now Philips show us some picture from the new windows as light application.

This means OLED panels could function as ordinary windows during the day and then morph into panels of light after dark, either by imitating natural light or by emitting attractive interior lighting.

During the day, people would be able to create their own private area by turning
transparent glass walls, windows or doors into walls of light whenever they liked. Transparent OLED panels are expected to emerge onto the market within the next 3
to 5 years.
Philips