The Mate 9 series should receive the Update in Three to four (3/4) weeks from now while for the P10 series, it should be in the nearest future.
In Addition to the update, The company also made mentioned security updates. Top-notch Huawei devices will get patches every month, with mid-tier phones receiving them every two months. The entry-level handsets will be updated once every three months.
Moreover, Huawei announced that the devices with EMUI 8.0 will have faster app launching and better power allocation. According to in-house test results, performance improved by 12%.
The user interface will also suggest features based on environment and user interaction, like a suggestion to turn on the blue light filter. EMUI 8.0 will also offer to open notifications in split-screen if the app is compatible with this feature of course. Probably The Emotion UI will sport the same basic design with no major changes.