I found the leaked image of new pixel launcher icons on VentureBeat. They have posted the full home screen layout, photo of the Pixel launcher. Find out what's new in the new pixel launcher.
Here is the leaked photo:
As you can see in the above photo, Google added new home screen navigation buttons in new Google Pixel launcher update.
New navigation buttons are completely filled in, the home button has changed from a solid circle with colors to a solid circle outlined by a larger circle.
It can a part of the new Android N OS, and may not actually be part of stock Android 7.1. After all, previous Google app updates, it's clear now Google is trying to give Android a new makeover.
APK file of Pixel Launcher has also leaked for all Android devices. Go through the below link to download the APK file and to know all features of Google Pixel launcher.
Google Pixel Launcher APK