http://uk.ign.com/articles/2017/10/23/f ... patibility
Apparently it plays at 1080p, 60fps and 16:9, which is very cool. And for those buying the X - it's native 4k
EDIT: Done some more research, and I believe it's 960p on the XB1 and S. It's 1920p on the X1X.
KOTOR also got a noticeably large improvement in terms of visuals
so I imagine Black looking even better.
Either way, I hope this boosts the popularity of the game - r/XboxOne has quite a few threads mentioning it, which is only a good thing!