This is such an amazing idea. I've already thought of two things it might be useful for: a) No headphone cords when running. b) No headphone cords if you fall asleep (just in case they get wrapped around your neck)
We have so many gadgets and so few outlets that directly accommodate them. Thankfully more of these USb wall outlets are showing up to make our lives easier. The U-Socket USB wallplug is a fully working outlet with two USB ports added.