Truly wireless recharging (done at a distance) is an exciting technology for which I can imagine plenty of uses. Still, a large part of me can't help but wonde

Truly wireless recharging (done at a distance) is an exciting technology for which I can imagine plenty of uses. Still, a large part of me can't help but wonder: how far off is a battery technology breakthrough that will let me, say, run my smartphone for a week? An order of magnitude leap forward in storage capacity would obviate much of the need for an over-the-air trickle of juice and would have huge value in the realm of electric cars.