While the PS4 date is unknown, Mojang's Daniel Kaplan tweeted that "Sony friends" can expect a "Minecraft surprise soon... or maybe sooner?!" That tease followed a PlayStation France tweet that claimed the PS4 version will release today, though as yet no other Sony channels have confirmed that. As soon as someone digs up a concrete release date for the PS4 version, we'll let you know.
Update: The PlayStation 4 version of Minecraft appears to have launched in the EU. There's still no word on when the game will reach North America or other territories.