Lots of good suggestions here. GE has 'light panels' [1] and one of the things which I am sure we'll see for 'installed' lighting will be 'sky ceilings' that would be a ceiling covered with OLED panels arranged seamlessly which mimic the 'sky' when you are outdoors, providing night views with stars, twilight colors, etc. Probably won't be the 'common' implementation however.
Generally I think one thing that will survive will be 115V ac power distribution. Its got a lot going for it in terms of installed base and understanding its transmission properties. The means LED based lighting will always have some circuitry to rectify and regulate that voltage. Of course they may evolve so it rectifies it to 135v dc and then runs off that.
I enjoyed the psychology comment as well. There were some comments that gas didn't give that 'homey hearth fire' smell when burned back when people were switching from wood fireplaces over to gas.
Even without constraint, I think you will find lighting fixtures don't change too much. You've got area lights and directional lights. The designers will have fun with them, glowing coils, maybe pillows that glow. But a good reading light puts out a uniform beam of light that can be directed easily to your lap. A good area light provides a widely dispersed light without being impossible to look at. Those constraints won't change because the technology has.
Generally I think one thing that will survive will be 115V ac power distribution. Its got a lot going for it in terms of installed base and understanding its transmission properties. The means LED based lighting will always have some circuitry to rectify and regulate that voltage. Of course they may evolve so it rectifies it to 135v dc and then runs off that.
I enjoyed the psychology comment as well. There were some comments that gas didn't give that 'homey hearth fire' smell when burned back when people were switching from wood fireplaces over to gas.
Even without constraint, I think you will find lighting fixtures don't change too much. You've got area lights and directional lights. The designers will have fun with them, glowing coils, maybe pillows that glow. But a good reading light puts out a uniform beam of light that can be directed easily to your lap. A good area light provides a widely dispersed light without being impossible to look at. Those constraints won't change because the technology has.
[1] http://www.ge.com/products_services/lighting.html