With the official release of Android 6.0, the Internet is rich with reports of new Android M features. As usual with Android, the announced features address both the broad (battery life) and narrow (support for creating and performing music). Time will tell which features stand the test of time and which do not.
Motorola has released a list of phones that will get the update to Android 6.0 and it's posted here. Phones not on the list may still be on the radar for updates containing bug fixes, security patches and updates to Lollipop, but won't move beyond Lollipop.
We're going to be testing M soon, but in the meantime, we are not above shamelessly feasting on information we've found elsewhere, as we work on adapting it for Motorola devices.
So far, the best resource I've found is Google's own site for Android 6.0. It runs through the major features with particular focus on Doze (better battery life), On Tap (get relevant information on-demand and fast) more control over security and app permissions. Be sure to click the "All Features" menu on the right to get information on additional features.
Other articles we like, from a little information to TMI: