Netflix on Q10 Pro, just as other streaming apps, is SD, but a nice looking SD (not even 720p). I cannot complain on my fullHD TV (42 inches). It will probably show on 4K TVs, if output is set to 4K in the interface. If HiMedia gets a L1 Widevine certification, it will worth twice the money I paid for it. I cannot actually test the output, the TV is receiving a upscaled signal. It shows 1080p on movies I know for a fact are 480p.