https://www.techradar.com/news/google-might-add-iphone-x-style-navigation-to-android-p

Android P is coming down the line and we're expecting to hear much more about Google's next mobile operating system update at the Google I/O developer conference in May. In the meantime, we may have some hints about updates to the navigation system, leaked by... Google itself.

In a screenshot posted to the Android Developers blog (and since adjusted to hide part of the user interface), the navigation bar takes on a whole new look, with a back button, a wider button, and no Overview (multitasking) button.