I wanted to add this chart to look at as it does reflect the vast improvement the 360 now is over the original x-box
http://vgchartz.com/hwlaunch.php?cons1=X360®1=Japan&cons2=XB®2=Japan&cons3=X360®3=Japan&weeks=238
You'll see it was weeks ago 360 surpassed the orginal in week for week sales, and ever since left it in the dust, they are now currently about 2 weeks away from outselling the x-box entire install base, before LO even launches. And it's clear it has an even brighter future.