Android M here's what you need to know
Android M design and interface
We expect Android M to be what iOS 8 was to iOS 7: the big changes in Android’s interface, like the adoption of Material Design, have already been implemented. We doubt Android M will look vastly different to Android Lollipop: expect evolutionary change and refinement rather than a gee-whiz new look.
A concept video for Android M has been uploaded by Android Hackz, and for all it's an unofficial video, we're impressed by some of what's shown – particularly the "app close" animation
Android M features
Improved notifications
Notifications are always being improved upon because they are so frequently complained about. We want relevant notifications, which only appear when we need them, and currently, this is not an exact science.
Rumor has it that the next step Google is taking with notifications is to unify them across all platforms. A notification seen on your PC would not appear on your phone or tablet, for example. It’s early days, but we’re expecting some changes to the way notifications are both displayed and interacted with on Android M.
Smart home
Android 5.0 Lollipop already focuses on consolidating everything Android has brought us thus far and makes attempts at providing a more stable and quality-assured platform.
On the broader front, the Smart Home will be an increasingly important feature of Android, with complete control over your connected devices at home and in the office via Nest and other third-party makers.
Security
With smartphones being increasingly used for, well... everything, security is something which grows ever-more important. Google recently introduced a "find my phone" feature to Chrome, and a "kill switch" option in Android 5.1 to make stolen phones useless, so look out for further security enhancements on Android M.
Android Wear
With reports that the Apple Watch has already shipped one million units (more than Android Wear devices did in the whole of 2015), Google will be searching for a way to fight back. Android M will undoubtedly bring some improvements to how smartwatches and smartphones interact, and probably with regard to notifications (once again) and voice input.
We may even see some AI robots introduced on which Android M will be demoed... or perhaps I'm just getting a little carried away. Whatever happens, we're pretty sure Android M will be all about bringing Android to as many new frontiers as possible: from your pocket, to your wrist, to your car and home to who knows what else.
Android M release date
Android KitKat was around for roughly a year between Android Jelly Bean and Android Lollipop update, so it is possible that the Android M release date could be set for October or November 2015.
http://www.androidpit.com/android-m-release-date-news-features-name