Here is the Wii 2, a concept I've created explaining how to make a Wii U portable. First, you would remove the internals of the Wii U system,and then take out the hexagonal framework in the back of the tablet, create a large enough battery for at least 4 hours, and put the motherboard in the back. Next, would be software and hardware improvements, as a flip button under the d-pad would make easy access to flip between the tablet mode and TV mode. The TV control button functions to allow you to use apps that support TV, and TV if set in a console mode. It could rest in standby mode on a desk and supports HDMI out.