Impressive....People that think PS4 won't sell too much this upcoming months forget the fact there's still a lot of people that wanted to buy a ps4 since launch, and by lot, i mean probably millions in USA, so is more than probably PS4 will sell around 500-600k in January in USA alone.
And probably will keep an average of 500k per month in USA until June....
Edit: Wii sold an average of 360k through January-June 2007 in USA.