An Echo knockoff and rapturous applause for variable font size in a messaging app. Not much innovation so far this year.
The horrific trend in Inbox and now Allo is machine learning auto reply so you can send something canned and inauthentic instead of actually speaking with people. Zombie Robs might approve but I'm far from convinced.
Updated 2016-05-18 14:12:
Android N looks super cool and I can't wait. The #1 productivity enhancement I'd like to see though is copy and paste icons that look like copy and paste. I do not have a clue currently.
Updated 2016-05-18 14:24:
Updated 2016-05-18 14:40:
Android Studio is very nice. Eclipse was painful. I actually like Android Studio more than Xamarin which is saying a lot for a C# leaning person.