OP updated
3.8m in week 1. So...600k off.
It's projected to sell 550k in the USA this week, so worldwide it should do 785k. I've underestimated it's legs
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