There are many unreported features for both PS4 and Xbox One popping up all of the time. In fact we probably won't find out about a lot of them until we get hold of the consoles for ourselves, however in the meantime we'll continue to report on any we find out about. So in that respect...
It's been discovered that when playing local multiplayer it’ll be possible to colour-code achievement pop-ups so that you’ll know who gained the achievement.
The video below, around the 11.00 minute mark shows this feature in action.