While you may have been waiting for Nougat, Google is ready to start working on Android O. Probably to be named Android Oreo, the first Android O Developer Preview is now out. The update will bring some interesting changes to Android, including new notification channels, picture-in-picture mode, adaptive icons, and much more.
Relevant: Steps to install (and roll back) Android Oreo Developer Preview on Pixel / Nexus
You may not see any major facelift that was introduced a few years back with Lollipop, but developers would certainly find the features interesting. More user-focused features will likely be revealed later in the development cycle.
Currently, Android O is onlyavailable via factory images and won’t be available via theAndroid Beta Program. This means no OTA updates for the moment. Google does plan to offer Android O via the Beta Program ahead of Google I/O.
Major changes and features in Android O
Background limits to save battery lifeRedesigned notifications: notification channels, snoozing, timeouts and notification dismissalsPicture-in-Picture mode:already available with Android TV, PIP will now be introduced to more devicesAdaptive launcher icons: support visual effects, and can display a variety of shapes across different device modelsColor management:Android developers of imaging apps can now take advantage of new devices that have a wide-gamut color capable displayWi-Fi awarePinning shortcuts and widgetsAccessibility featuresMulti-display support
Can't wait to try Oreo? The Android O factory images forPixel, Pixel XL, Pixel C, Nexus 6P, Nexus 5X, and Nexus Player are now live. Here are the direct download links, which you can use to flash factory images right on your Pixel or Nexus devices (instructions here):
PixelPixel XLPixel CNexus 6PNexus 5XNexus Player