Microsoft is calling it "the biggest launch in Xbox history." Just as the PlayStation 4 did, the Xbox One has also sold one million units in a 24-hour period.

Microsoft claims that so far 3.6 million miles have been driven in Forza 5 and over 60 million zombies have been killed in Dead Rising 3.

The key difference to note here is that the Xbox One launched in 13 countries yesterday in order to reach one million units sold. The PlayStation 4 was launched in only North America (United States and Canada) so far. It's also interesting to note that the PS4 is still backordered to the tune of 2.3 million units just at GameStop alone.