After its announcement back in August, the Huawei Honor 8 was revealed to have some updates added to the phone for at least the next two years. 
What that meant basically was that users are to expect that the phone will be updated to at least two major Android builds over time.
So for the first major update to hit the phone, it seems it will come early next year (year's practically over). According to  the Chinese company, the Android 7.0 Nougat update is scheduled to arrive for the Honor 8 come February 2017. As of now no specific dates have been given, but it shouldn't be too long.
The update is also expected to introduce EMUI 5.0 onto the Honor 8, which is basically the company’s take on Android that debuted with the Huawei Mate 9. So far Android Central is claiming that the latest version of EMUI feels great, so this is something that Honor 8 users can look forward to as well.
This is still developing and once a date is confirmed you will be able to find an update here.