Of the announcements I've read about and seen during the Google I/O 2016 live stream, I think Instant Apps is the most interesting and innovative. If done well, Instant Apps could change how we think about mobile apps. The Verge agrees.

The Android Developers Blog introduces Android Instant Apps.

Today, to run an app on a smartphone or tablet you need to go to an app store, like Google Play or the Apple App Store, find the app and install it.