The Nokia 6 and its counterparts were sold on the promise that the company will take Android updates seriously. Sticking to that promise, HMD Global has officially confirmed that the Nokia 6, Nokia 5 and Nokia 3 will be updated to Android O. Presumably this extends to other Nokia devices that may launch soon.
Google is still tinkering with Android O, it is slated to launch sometime into the third quarter of this year. And then it will take some time for HMD to port the new OS over to its phones – the company did not commit to any time frames.
The hope is that the mostly pure implementation of Android on the Nokia phones will not present any major challenges in porting. Once on O, Project Treble should make future updates much quicker. Read more about the Nokia 6, 5 and 3 here.