The reason these statistics are being reported by gaming sites is to emphasize how Microsoft's experiences of good performance in Japan have been few and far between. In North America the PlayStation 3 (PS3) has definitely found its punch too, and is closing the gap on the Microsoft system at the moment.
Both however have to watch the dust of the Nintendo Wii console racing ahead of it, dominating sales statistics around the world almost every week and month. Of course, this is far too early to predict a "generation winner" now but after the past couple of years it is nice to see the console battle actually resemble a battle, with three strong participants.
If there is anything to take away from Microsoft's moment in the light in Japan, it is proof that the quality and variety of the games being offered is still what all the players need to focus on, which works out perfectly for consumers too.