[Tinwarble]

Here's some feature highlights, which are specific to Kodi use for the Android 8.0 update:
  

• Improved color space conversion such as from Rec. 709 or sRGB source content to Rec. 2020
  

There are more changes which can be found HERE, but these are probably the most important for Kodi use.   

 I really would like to know WHAT has been improved. Is it now on the same par as the ATV 4k?  

  
Suggestions elsewhere that to make use of the new colour space (aka gamut) conversion you need software to specifically call an API. Not sure Kodi, or MrMc, does that yet. 

Where were those suggestions made?  The last time it was discussed it was there was nothing for apps to implement.

That said, I'm currently hearing mixed results.  Some people are saying that it looks better (more of these, but it's a small sample), others have said it looks the same.  Until someone looks at the output to see if the colors are better or not you'll just have to go by your eyes.