I said "Wii" not "Wii U" because this is about how Nintendo became on top. For a company to succeed, they need time and dedication to research the market. In any case, Nintendo targetted a big wide open audience that had little or no interest in gaming.
Hardcore gamers can say that Nintendo "Stop caring about us" but in reality, the hardcore gamer stopped caring about Nintendo a long time ago, which lead Nintendo to go in a different direction for its time.
Did the Wii sold because of Motion Controls, Wii Sports, or the library of games? This youtube video may help understand what Nintendo was doing before the Wii came to be.
http://www.youtube.com/watch?v=DaKgMcFP4Mo
I wanted to show this video because too many gamers make assumptions on how the Wii became a success by jumping to conclusions. Hopefully this video will help to understand the importance of Marketing to those gamers for these companies to sell console hardware.