Microsoft announced earlier this month that the installed base of Xboxes worldwide has reached 13.7 million, and the Xbox Live service now has 750,000 subscribers.

When you look at that in context of the other recent announcement, that Halo has now sold 4 million copies of its Xbox iteration, one question becomes clear:

What in God's name are those 9.7 million people who have Xboxes but don't have Halo playing? Fusion Frenzy?