The first new mirrorless camera announcement of 2013 goes to Samsung, with the launch of the NX300. While the sensor is still 20.3mp, it's been redesigned to include phase detect autofocus sensors, giving the NX300 a hybrid focus system ala the Canon EOS M, Nikon 1, and recent Sony NEX models. The other new feature (from the NX200) is the inclusion of a 3D system (which requires the new 45mm f/1.8 2D/3D lens). The camera is expected to retail for US$750, and will be demonstrated at CES next week.
I've added the new camera to this site's camera database.