A future Disney concession stand? Little individually lockable cages with power receptacles to recharge cell phones, etc. Rent one, take the key, then come back later for your phone. Or have a separate charger and spare battery to leave in the cage while you keep your phone. Maybe different sizes for laptop, iPad, cell phone, Game Boy, etc. Useful accessory: A 3 prong to 2 prong adapter. Use as a standoff or extension in case the receptacle is recessed in the wall or floor and your charger block (wall wart) won't fit.