http://www.techradar.com/news/android-oreo-likely-wont-come-to-the-samsung-galaxy-s8-until-next-year

Work has already begun at Samsung HQ to ready the next software update for its most recent flagship phones to the latest Android 8 Oreo software, but it’s going to take more than a while longer.

The new software update is rumored to be landing early 2018, meaning we won’t see it for at least another two months and it may take even longer to land on your specific phone.