It is obviously an improvement over the current wireless charging technology which requires you to put your handset on a pad. We really haven't come that far since Palm introduced the Touchstone wireless charging system when it announced the Palm Pre back at CES 2009, so this would seem like a great idea on its face. But there is a catch and it is a big one.
Powering up the magnetic field could end up causing Lightsquared style interference, meaning that it can be problematic. Credit cards with a magnetic strip might have critical information wiped out and who knows what will happen to your hard drives. But we're sure that Apple will have all of the answers before releasing such a system. Or, considering the speed at which Apple's army of attorneys defend the Cupertino based firm's IP portfolio, this could just be a warning to others working on similar technology to tread lightly.