x EL panels No, but they're to expensive for usage on every wall. Personally, I think they'll be pushed towards fringe applications by a technology Asmimov did

x EL panels No, but they're to expensive for usage on every wall. Personally, I think they'll be pushed towards fringe applications by a technology Asmimov didn't predict. High efficiency LEDs. x Smart glass Yes, but again a cost question. There's this [http://money.cnn.com/video/technology/2012/01/10/t-ts-samsung-clear-tv.fortune/ http://money.cnn.com/video/technology/2012/01/10/t-ts-samsun...], by Samsung. I don't see why you couldn't replace your windows with such screens if you had the spare dough. Also, there's privacy glass, which is cheaper, but still sets you back 500USD/m². x Fusion power plants. Those might be a couple of years off. x Radioactive batteries. Exist, but not in the scale and power density Asimov predicts. There are nuclear batteries for pacemakers [http://en.wikipedia.org/wiki/Betacel http://en.wikipedia.org/wiki/Betacel]. x Moving sidewalks Yep, only at chokepoints and long stretches of unidirectional people movement indoors. x Moon colonies. They're on the other side, hiding. Trust me on this one. A lot of these points are arguable. I'm easily excitable, so I consider technological feasibility/existence as a check, but your view on it may be more somber (It has to be exactly as he predicted). I'm just amazed he got that much of it right. On a side note, why couldn't the non-asimov prediction with blimp filled skies come true? They're like sky whales...and I really should get some sleep.