VGChartz Writes: "Looking at the total sales of the PlayStation 4, Xbox One, and Wii U in May 2015 we can see that the PlayStation 4 has continued to grow its lead over the Xbox One and Wii U.
The PlayStation 4 passed the 23 million mark this month and has sold 23.22 million units lifetime, the Xbox One has sold 12.84 million units, and the Wii U 9.73 million units.
PlayStation 4 Total Sales: 23,217,798
Xbox One Total Sales: 12,835,320
Wii U Total Sales: 9,727,909"