You really think PS4 cant ? adding Japan and good supply, it would be easy. You're really underestimating the demand.
Hyperbole works both ways. PS4 demand will die down. It's not just going to skyrocket and suddenly be the highest selling console of all time. Good system sure, but people need to really calm down about it....
Obviously yes, demand will die down, including 3DS demand , after christmas, but at christmas, they easily could have made the same numbers with supply+ Japan