According to Samsung official support page (Turkey), Galaxy Note 8 will get the Android 8.0 Oreo update by March 30, 2018. Galaxy S7 and S7 Edge will get the update by April 13 and Galaxy A7 (2017) will receive the update by May 25. It is also expected that the recently launched 2018 line up, such as Galaxy A8 and A8+ will also get the Oreo update soon.
Official List of Galaxy Phones Getting Oreo Update and ETA
You may also check unofficial list of Samsung Galaxy phones likely to get Android Oreo update. One you get the update, you will have the Oreo goodies like enhanced Picture-in-Picture, improved copy and paste function, advanced autofill for passwords, new emojis, custom notifications, and much more. Apart from the Oreo goodies, Samsung also brought features to enhance user experience like new clock styles, smart view, new settings for Edge panel and more. For your information, Google has already released the Android 9.0 P Preview for the Pixel series, and the stable build will be released by August or September 2018. But it will take several months to get the Android 9.0 update on a Samsung phone. (Source 1, 2)
