OLED Lighting (Windows that light-up)
OLEDs (organic light-emitting devices) could be the household light source of the future but instead of having a boring old bulb in the middle of the ceiling any surface could be giving off life.
An Organic LED is like a transparent sheet when turned off but when powered gives off light. This could mean windows act like normal windows during the day but at night the windows become the light which just seems kind of cool.
You can read more about the technology on Smart Economy and find out how OLED’s work on How Stuff Works.
[Found via Inhabitat]