[ozkhan1]

 Not really. What apps are you trying to run?

YouTube will get you 1080p max for now. 4K VP9 is possible; but inputstream (Kodi add-on) does not request the 4K stream to my knowledge. I think this is being looked in to. 

You read my mind, sir..

Youtube...sling tv and some asian low key iptv services... most are just 1080 max, except youtube of course..

Have you guys got moonlight working on osmc yet?  

Moonlight: we've slowly made some progress and we're now getting some engagement from Moonlight guys which helps.

YouTube: 1080p for now
SlingTV on Linux: don't think so.
IPTV is IPTV, so you can use the iPTV add-on. 

Hope this helps

Sam 

 Thanks for your feedback. I guess I will settle for kodi and moonlight as long as its working, which will be soon hopefully.