Also note that 50 million puts DS past the SNES.
BTW, those saying "the DS could hit 60 million by the end of 2007" are really underestimating the momentum. The DS had only shipped 40.28M units at the end of March 2007. Now it's about to hit 50M in sell-through. So it sold 10M units over 5 1/2 non-holiday months. There is absolutely no question that it will sell through 10 million in the 3 months of the holiday quarter.
My prediction: DS will reach 100M shipped by the end of December, 2008.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.