Huawei Honor confirmed Honor 8 Pro will be updated to Android Oreo before the end of December 2017. But the update did not happened till date. Now, it seems Honor is gearing up for the release , as Honor started to release Android Oreo beta version for Honor 8 Pro, DUK-L09 22.214.171.1245.
User from XDA forum has posted the screenshot of the update. If beta versions are smoother than we can see the final release of the update soon to all Honor 8 Pro devices.