Doesn't mean it's not selling well at the market.
Similar situations:
1) 360 sold 0.8 million in November 2007. In December 2007, it managed 1.3 million.
2) 360 sold 0.8 million in November 2008. In December 2008, it managed 1.4 million.
3) PS3 sold 0.7 million in November 2009. In December 2009, it managed 1.4 million.
4) PS3 sold 0.5 million in November 2010. In December 2010, it managed 1.2 million.
5) Wii sold 0.9 million in November 2011. In December 2011, it managed 1.1 million.
...The PS4 should manage 1 million. Maybe not much more than 1 million...but it's at a good place in the market right now.
But who knows. Maybe the market front-loaded sales to November and December is getting weaker. Maybe market trends are reducing December to the point that PS4 is flat MOM.
We need more retail indications.