[caphm]

I think 4k is only supported on Android at the moment, although I have never seen it working as I only have the standard package.

I'm still trying to understand exactly what version of Netflix I'm using, because I read a while ago that it had been updated to include the Movies and Tv show categories on the main menu, which my working version of Netflix does not have......Yup, a mystery for sure!  

You need one of the 0.14.0 betas for these items to show up in the main menu. Please be aware that 0.14.0 introduces significant changes, especially regarding items exported to the Kodi library. Old exports will no longer work and must be exported again (migration routine will follow before official release).

There are still some playback issues on certain titles due to Netflix changing things on their end. We're working on sorting these out.

4K and HDR will only works on Android! Additionally, your device must be Widevine L1 and you must enter the ESN from the Netflix App in the add-on settings. Cheap Android boxes won't work in most cases, because they are only Widevine L3.

There is no roadmap on when > 1080p will be supported on other platforms, as it's currently not technically feasible.