The Pixel 2 launcher comes with new features including the bottom Google Search bar, a Glance widget, and minor animation changes. Rest is same as the previous Google Pixel launcher.
The APK weighs in at around 2.52 MB and can be downloaded from the below link. Note that to access the Google Feed which is available on leftmost screen you'll need to Install the below APK file as the system application.
Recently Google updated its Wallpaper Application with Pixel 2 wallpaper and other interesting categories. Google Wallpaper will be the best complement for Pixel 2 launcher.
Download: Pixel 2 Launcher