MepH on 18 December 2014
I guess it's by the end of last week.
There's a Nintendo France Interview from this morning in an other thread right now using numbers up at the end of last week too.
But we can't be sure at all.
Prediction: End of 2015 Hardware sales (as of January 20, 2015)
Wii U: 12.1M | XBO: 19.8M | PS4: 36.0M | 3DS: 58.5M | PSV: 11.7M
