even if the sale does not drop in Japan at all, the sale numbers have to hold steady in NA and Other with one less shopping day on Christmas Day... that means almost 17% increase each day for 6 days during the shopping period and the last day is AFTER Christmas... unlikely
MikeB predicts that the PS3 will sell about 140 million units by the end of 2016 and triple the amount of 360s in the long run.