Android 5.0 is officially here. Along with this, Google has also announced the newest line of Nexus devices. Also, the Android L preview has been updated to include the final release of the Lollipop API.
Starting in the coming weeks, Nexus line devices will begin to see the OTA update. Currently, you can download the update to flash via adb for the Nexus 5 & 7. Other Nexus & GPE (Google Play Edition) line devices will begin to see the latest update roll out to them in the coming weeks / month.
— Android (@Android) October 15, 2014