Shouldnt you compare Wii/DS to PS3/PSP? That would be a more relevant comparison.
OT: I don't think the PS3/Xbox360 will ever catch up to the Wii/DS numbers...








My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right







