Not sure if this has been posted yet or not, but sounds good:
http://www.phonearena.com/news/Andr...AM-usage-focus-on-better-battery-life_id69675
Android M rumored to cut down on RAM usage, focus on better battery life
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And even more projected features for Android M:
http://www.phonearena.com/news/Andr...pected-and-most-probable-new-features_id69647
Most probable Android M features
1. General OS polishment
All things considered, it seems Google won't be jumping "all-in" once again - major, groundbreaking new features or a visual revamp are highly unlikely. Whatever it ends up being called, we expect Android M to be everything that Lollipop isn't.
2. Improved Material Design looks
Material Design is great-looking and all, but even Google itself did not follow its own guidelines to the fullest, as certain design inconsistencies in its stock apps are not uncommon, even now. A further improved and polished Material Design look, with an even flatter and minimalistic "quantum paper"-inspired UI.
3. Better performance
Call this a no-brainer, but the next version of Android will most likely feature even better performance, RAM usage, reduce activity when the device is asleep, and reducing app wake-ups.
4. Multi-window functionality
Samsung does it, LG does it, Sony does it, why can't Google do it as well? Multi-window is among those features that certain Android phones come with, but those running pure Android are not among them. Well, according to certain AOSP commits, a multi-window-like feature might be coming to the next iteration of Android.
5. Universal quick reply in the heads-up notifications
This feature is supported by Android at the moment, yet it's not universal - developers might allow users to quickly reply to message notifications or interact with them in other ways, but this has to be exclusively baked into the app in question. Native, universal support (like the one in iOS) is yet to come.
6. Voice controls
Google is most probably aiming to adorn the next Android flavor with improved voice controls, allowing you to do even more things hands-free, most certainly with the aid of an improved Google Now.
7. Native fingerprint authentication
The major players on the market already have a number of devices that have a fingerprint scanner on board. This security-centric functionality evolved from mostly a gimmick to an actually useful and convenient feature that is seemingly regarded highly by both users and manufacturers. Thus, it was logical that Google might consider baking in native support for fingerprint scanners.
8. Proximity-based communication
According to certain rumors, the next version of Android might be sporting a feature dubbed "proximity-based communication", which will reportedly allow Android phones to discover other nearby-situated Android devices. We can only speculate as to what Google has in mind with this, but we suspect that it might have a lot to do with Google's home automation tech that will certainly make the rounds at Google I/O.
9. Android for Work
Google also seems poised to reach to the enterprise market even more with its next Android iteration. As per the already-leaked info, Android M will be "bringing the power of Android to all kinds of workplaces". What's more, considering the allegedly coming fingerprint functionality, which will further make Android more secure, and thus, more appealing to enterprise customers.
10. Android Pay
Android Pay was already confirmed by Google a few months ago. It will be a new API written from scratch, yet still compatible with the existing payment solution of Google, Google Wallet, and will enable users to make use of both in-store and in-app payments. As a refresher, bothApple and Samsung already have similar payment systems.