We've been (somewhat) taken with Nintendo's dual-screen handheld's 3D screen, AR features and overall unique experience, but it appears that the 3DS has been a real boon to gamers, with more than four million U.S. consumers picking up the console since it hit stores in March of last year. 3DS games like Super Mario 3D Land and Mario Kart 7, which sold more than one million units each in the US alone, were also incredibly popular, along with the aging Wii, which made its way to 4.5 million additional U.S. households in 201