Note that the Switch is still very much far behind the Sony PS4 in terms of overall units sold (Microsoft hasn’t officially shared sales figures of the Xbox One), but at least as far as 2018 is concerned, the Switch outsold everyone else. It also managed to have the best December sales of any console of this current generation.
According to NPD analyst Mat Piscatella, “Nintendo Switch generated the highest December-month hardware dollar sales for a single platform since the Nintendo Wii in December 2009. And it achieved the highest December unit sales for a single platform since December 2010.” It was also suggested that Super Smash Bros. Ultimate played a big role in that, and it’s not hard to see why.
There have been rumors suggesting that Nintendo might launch an updated Switch in the later part of the year, but that remains to be seen. In the meantime 2019 is also expected to be the year in which a new Pokemon RPG for the console will be launched, which should definitely help boost sales of the console.