As promised EMUI 8.0 is being delivered to Huaweis Mate 9 and Mate 9 Pro (also the Porsche Design model). This is the latest version of Huaweis Android customization, it is based on Android 8.0 Oreo.
The phones launcher around this time last year with EMUI 5.0 which was based on Android 7.0 Nougat (Huawei decided to rejigger the version numbers).
Anyway, this new versions brings over many of the AI features that the the new Mate 10 brought. This includes the digital assistant with voice commands, translation and more. The desktop mode, called Projection, is part of the update as well.
If the update hasnt reached you over the air, you can use Huaweis HiCare app to request an update. Note that it seems the rollout started in China so other regions may need to wait a while.
The EMUI 8.0 update for the Huawei P10 and Honor V9 is currently in Beta.
Source (in Chinese)