At the moment, our choice of lighting is fairly committal. We drill holes in our ceilings for permanent placements of bulbs. But LEDs open all sorts of other possibilities.
It's not hard to imagine a ceiling covered in RGB LEDs, like Seo Dong-Hun's Draw the Lights concept. Equipped with a few sensors, a laser (or IR) pen could "paint" an array of light, allowing you to customise your entire living space in a manner not unlike a Philips LivingColors lamp... only a lot more immersive. [Red Dot via Yanko Design]