I think that they've Undertracked Playstation 4's WorldWide Sales, this isn't fault of the VGChartz, is a lot hard to get the Data from USA, UK, and is Even Harder to get Worldwide data, Hopefully Microsoft, will announce their Sale numbers in April, or March, and we will Finally Know How good Xbox One is Doing.
i expect that Playstation 4, will Reach 45+ Millions in Uncharted 4's day of Launch , because of the Pre-orders, and Because Playstation 4, already sell more than 1 Million Per Month.