I got some tidbits about two more features that Samsung plans to add on the NX1 via future firmware upgrades:
1) raw lossy compressed files (ala sony) selectable to increase buffer size and reduce file size in general. The compression has been studied to retain 95-99% of sensible information, while reducing of 15 to 30% the file size.
2) cropped 4k (along with the already existing downscaled 4k).
I have no detail about when exactly the next firmware will be released but I have been told it’s “very soon”.