A year or two ago, I read a short article about someone at MIT who lit a light bulb from several feet away without using a wire to connect it to the power source. This article unveils what the experiment at MIT was working toward: Wireless electricity for appliances and other devices. There are several versions; one uses a pad with a short-range inductive system that can charge compatible devices placed on it. A cell phone or mp3 player with the proper hardware could charge without being plugged into the wall, for example. Other systems work over longer distances to power large appliances and other systems - one system even converts electricity into radio waves, using a receptor in the device being powered to convert the waves back into electricity. There's no chance of accidental electrocution, either; these aren't lightning bolts shooting through the air. It's as dangerous as WiFi, and a lot more useful (fat lot of good a signal is if your laptop battery's dead).
I imagine it'll follow the same pattern cell phones did; at first a few people on the bleeding edge will have the technology, either as work tools or status symbols. Then, as it becomes cheaper and simpler, with a wider range of uses and options, it'll become widespread to the point of ubiquity, and eventually the old technology will become a near-relic of a former age. Cords and plugs will still exist the way landlines still exist, but the younger generation will favor wireless chargers and other new technologies over the old, clunky plug-and-outlet set-up. It's a fascinating prospect.