there's a technology out there that will render wall outlets and car power adapters obsolete, it's only a matter of getting it into manistream...
it's a pad that can charge a device when you place it near the pad. Wireless Power - now that's trick....
but the device needs to have a built-in reciever to accept the power signal from the pad. i would say give it a few years and you'll be using these pads everywhere....'one power wire to charge them all...'
A wireless recharging pad | Crave : The gadget blog