The developer preview version of Android 7.1 Nougat is expected to come out by the end of the year, targeting at least the Nexus 5X, Nexus 6, and Pixel C devices.
http://www.notebookcheck.net/Android-7-1-update-coming-to-Nexus-devices.179325.0.html
So will the Nexus 6 get daydream
Wow but the most important one isn't mentioned (The Google Assistant as Android 7.1 Nougat official assistant). I hope it's coming and it can replace Google Now 🙏🙏. Google Assistant is an awesome feature that can't only get stuck in the Pixel Phones. Because if that happens then Google doesn't care about the other Android phones, even the Nexus phones that were well supported. :(