I understand the problem, but it is a real easy engineering problem to solve. All the widgets already exist, you are just now arranging the widgets in such a fashion to actually treat this very real problem. You are not designing a widget from scratch, you are just gathering up existing widgets and putting a little more power to the tablet so you charge the tablet and you are changing the shape of the plug from usb A to usb micro B.
Since the only problem is logistical, throwing money at it is very easy to get a final problem, for money is at its core a logistical solution instead of tactics, strategy, or diplomacy which have less to do with money than logistics does.