Looking at the total sales of the PlayStation 4, Xbox One, and Switch through December 2020 shows how the Switch has been consistently gaining on the lifetime PS4 sales since the middle of 2019. The PS4 is ahead of the Switch by 37.8 million units and the Xbox One by 65.4 million units. The Switch is ahead of the Xbox One by 27.6 million
The PS4 is 3.86 million units away from outselling the Game Boy, which sold 118.69 million units lifetime. The Switch has outsold the 3DS, which has sold 75.82 million units to date. The Xbox One has outsold the SNES, which sold 49.10 million units lifetime.
The Switch passed the 76 million mark. The PS4 has sold 114.83 million units lifetime, the Switch 76.99 million units, and the Xbox One 49.44 million units.
Looking at the marketshare, the PlayStation 4 currently leads. The PlayStation 4 has a 47.6 percent market share, the Switch sits at 31.9 percent, and the Xbox One at 20.5 percent.