Android 7.1 Nougat update for Nexus devices to be rolled out starting December 5
Update: Canadian carrier Rogers has it that Android 7.1.1 should be ready for roll out in North America starting December 5.
If the Nexus 6P is getting Android 7.1 on December 6, the Nexus 5X, Nexus 6, Nexus 9, Nexus Player and Pixel C will likely receive the update at about the same time (not just in Australia, of course). As you probably know, the Google Pixel and Pixel XL phones already run Android 7.1, but they, too, will receive updates in early December, since they need to get their monthly security patches.
An Android 7.1 Developer Preview is already available for the Nexus 6P and Nexus 5X - if you can't wait until the official over-the-air update arrives, and you know what you're doing, you can download the Preview from Google here.
Things that are NOT allowed: