Nintendo's (NASDAQOTH: NTDOY) Switch console hit stores on March 3, and early indications suggest that the hybrid handheld-home-console video game system is off to a strong start. According to research firm SuperData, sales of the hardware passed 1.5 million units in its first week at retail -- impressive considering that Nintendo initially targeted sales of 2 million consoles worldwide for the system's first month.The Wall Street Journal has reported that Nintendo is doubling its production of the Switch for the fiscal year starting April 2017, increasing the order from 8 million units to 16 million units. GameStop (NYSE: GME) has also chimed in, characterizing the sales of the device as "phenomenal" and stating that it could be on track to surpass Nintendo's hugely successful Wii console.