As far as I can tell, a great effort has been done by innovative scientists in this research area. A couple of years ago, a research team in MIT succeeded to wirelessly transfer power 60 watts for 2 meters with an efficiency of 40%, they published it in Science.
Now, the transfer range and the efficiency levels are increasing on a startling pace, and hopefully soon (WPT) would be adapted in most of our home applications such as charging Laptop & smart phones. Moreover, scientists have achieved new technologies and techniques for transmitting power wirelessly from a stationary source to a mobile receiver.
This means the electric vehicle (EV) can be charged while driving, and it allows the EVs to run forever, without a single stop.