thismeintiel on 17 January 2014
As long as Sony keeps up with stock, it should be quite easy. It seems the demand for the One started to die off after Xmas was over, as it became readily available at retailers. The PS4 still has quite a bit of pent up demand, as stock usually sells out within 24 hrs of becoming available.
It's also #2 in Amazon's Bestsellers of 2014, while the One is #12. And as you mentioned, Sony shipped more PS4's at the beginning of January, so hopefully it was a large shipment.
