It's been a long time coming but Nintendo has finally dominated both the hardware and software sales according to the February 2015 NPD figures. Nintendo had the best selling game for the month, The Legend of Zelda: Majora's Mask 3D, and the best selling hardware with the 3DS family of products.
February 2015 Software
1. The Legend of Zelda: Majora’s Mask 3D (3DS) (515,000 copies sold digitally and physically)
2. Evolve (Xbox One, PS4, PC)
3. Dying Light (PS4, Xbox One, PC)
4. Call of Duty: Advanced Warfare (Xbox One, PS4, 360, PS3, PC)
5. Grand Theft Auto V (PS4, Xbox One, 360, PS3)
6. NBA 2K15 (PS4, Xbox One, PS3, 360)
7. Dragon Ball: Xenoverse (PS4, Xbox One, PS3, 360)
8. Minecraft (360, PS3, Xbox One, PS4)
9. The Order: 1886 (PS4)
10. Monster Hunter 4 Ultimate (3DS) (290,000 copies sold digitally and physically)

As far as the hardware side of things is concerned, the 3DS family of products (New 3DS XL, XL, 3DS XL, 2DS, and 3DS) told 395,000 units. The PS4 was the best selling console. The Xbox One sold roughly 276,000 units and the Wii U sold roughly 94,000 units. Here is what Nintendo had to say about their stellar month.
The one-two-three punch of New Nintendo 3DS XL, The Legend of Zelda: Majora’s Mask 3D and Monster Hunter 4 Ultimate helped Nintendo 3DS become the top-selling hardware platform in the United States in February. All three products launched in the United States on Feb. 13, and even with only 17 days of data being reported they were able to accomplish the following:

In its 48th month on the market, the Nintendo 3DS family sold nearly 395,000 units in the U.S. The great majority of these sales were New Nintendo 3DS XL systems, which sold 130 percent more units in its initial frame than Nintendo 3DS XL did when it launched on Aug. 19, 2012.

The Legend of Zelda: Majora’s Mask 3D was the top-selling title for the month with more than 515,000 combined physical and digital units sold. The game is now the fastest-selling Legend of Zelda hand-held title in U.S. history.

Monster Hunter 4 Ultimate sold more than 290,000 combined physical and digital units and is now the fastest-selling Monster Hunter title – across all platforms – in U.S. history. In addition, the game has the highest Metascore of any Monster Hunter title and is also Capcom’s fastest-selling title on the Nintendo 3DS platform in U.S. history.

Through the first two months of 2015, sales of Nintendo 3DS hardware have increased by more than 90 percent over sales in the same period in 2014.

Nintendo also saw strong results for Wii U, which had its best year ever in 2014 and has continued to build on that momentum in 2015. Specific achievements include:

So far in 2015, sales of Wii U hardware have increased by more than 20 percent over sales in the same period in 2014.
Life-to-date sales of Super Smash Bros. for Wii U and amiibo have surpassed 1.5 million total units and 3.5 million figures, respectively, an attach rate of nearly 2.5 amiibo figures per game unit sold.