KEY POINTS
  • In an interview at E3, Nintendo America President Reggie Fils-Aime says he's not worried about the Xbox One X.
  • "Our demographic is much wider. ... We're much more family-friendly," he told CNBC.

Nintendo shares are up some 50 percent so far this year on surprisingly strong sales of its new Switch gaming console and the games it launched with.

The Switch sold 2.74 million units worldwide in less than a month, and the "Legend of Zelda: Breath of the Wild" game for the console has sold just as many copies.

This week at E3, the company unveiled a lineup of games it hopes will keep up that momentum.