The Galaxy Note 8 is the first Samsung smartphone to run Android 7.1.1. In case you want to get some taste of Note 8's UI, you can grab and Install the Ported Flashable ZIP file on your Samsung device running Android Nougat.
The Zip file contains Phone and Contacts Incall UI, Browser, Clock, Calendar, TouchWiz Home, Edge Lightning, Task Edge, People Edge, S Finder, Samsung Themes Store, Smart Manager, Keyboard, Gallery, Calculator, Weather.
You'll be needing Root and a Custom based recover in order to Install that Note 8 Zip file. Grab the Note 8 Apps (Flashable Zip) from XDA.