Nintendo says it has sold more than 4M 3DS units in the US

VentureBeat Both of those titles have sold more than 1 million units each in the US Nintendo needs those kinds of results to ward off competition. Sony is launching its rival PlayStation Vita in the US on Feb. 22. That system has high-end graphics, a high-quality ... http://venturebeat.com/2012/01/03/nintendo-says-it-has-sold-more-than-4m-3ds-units-in-the-u-s/