PlayStation 4 to Outperform Xbox One by 40 Percent by 2019
Microsoft shipped 12.4 million Xbox One units, cruising past the 10.4 million Xbox 360 units shipped in its first year, but mirroring some of the difficulties of the PS3 launch, such as a high price point.
The struggling Nintendo Wii U is following in the footsteps of the GameCube, having shipped only 5.9 million units in its first year of availability, but appears to be staging a modest comeback with the release of several key first-party titles.