Already guessed, Android 8.1 is the next version, because android oreo is already so sophisticated of android feature, no direct might be called android 9.0, android 8.0 to process progress, hoping there are features VR and AR on android feature after android 8.0 now, i also guessed maybe android version 10 after android 8.0, 8.1, 8.2 or next, as well as Microsoft with windows 8.1 then windows10 now, but not 9.0, but i don't know if maybe also android later come with 9.0 version.
LOL neverending updates.. In the future your phone has to be updated everyday during the night so you cant use your phone between 12am to 6am..Great
Only Pixel and Nexus devices have Oreo and they are planning to release next update.
Good job Google.