It's Christmas rumor time :)
SamsungCameraRumors reports:
Samsung is seriously considering to launch a special NX1-lx camera version with lower than 20 megapixel sensor. It will have 1 stop better High ISO performance than the current NX1. And it has 2 stop better high ISO than the current NX30/NX300 cameras.
The likely release of the camera is second half of 2015.
from Mirrorless Rumors