It’s no secret that very soon will be another conference Google I / O 2015 developers conducted by Google. At this conference the following mobile operating systems will be demonstrated Android M.
What Nexus devices in the future will be updated to the latest version Android M? If we consider the Google license agreement with manufacturers, we can see: «The manufacturer is obligated to release updates for devices within 18 months after the official start of sales.»
Thus it can be assumed that the Nexus July 2013, Nexus 5, Nexus 6, Nexus 9, are guaranteed to receive the firmware with a new version Android M. Nexus 7 owners of 2012 and Nexus 4 are less fortunate and expect an update is not necessary.