PSLS Sales Analysis: Things aren't quite as grim as the slope would indicate.
"The weeks right after New Years see very few (if any) new releases and come with predictable drops in game hardware and software sales. It generally opens with a bang, then takes a giant drop. This year, not a single new game was released in Japan until the 15th of January, when PS3 got the Bioshock Infinite Complete Edition, 3DS got Kenka Bancho 6, and Vita got a new Diabolik Lovers adventure. On the 20th, PS4 got the Resident Evil Re-REmake, but that game’s data won’t be on these charts."