The Wii U GamePad started life as this - CNET

Nintendo has revealed an image of the prototype Wii U GamePad, involving two Wiimotes and some double-sided tape.

E3 2011: Nintendo Wii U First Take - CNET

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Stylus Pen for Wii U Gamepad, Xahpower Replacement Stylus Compatible with Nintendo Wii U Gamepad, 4 in 1 Combo Touch Styli Pen Set Multi Color for Wii U Gamepad : Video Games

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Nintendo Wii U review: ​A great game system for kids, but its successor is on the horizon - CNET

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