Wow! Halos game page has just been updated... It's now at 4.55m, so it's sold 750k+ this week. Amazing hold!!
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