Tagehgbged.
By the end of the year the X360 will be 1.3m units higher than the PS3...meaning the total gap will be ~3m.
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