Not sure this is threadworthy, but Android N is officially out for Nexus phones. Key features in my opinion:
Multi-window (split screen between multiple apps)
Quick switching (kind of like alt-tabbing on a computer)
Doze now works in a pocket or purse
Improvements to notifications and quick settings
Future OS updates will happen in the background (kind of like Chrome)
Anyway, more details here:
https://www.android.com/versions/nougat-7-0/