https://arstechnica.com/gadgets/2018/05/hands-on-with-android-p-preview-2-its-a-work-in-progress/

MOUNTAIN VIEW, CALIF.—With Google I/O winding down, we finally have a spare second to look at the newest release of Android P. The second developer preview moves the OS into "beta," and it's not just for Pixel devices, as it also runs on a host of third-party flagship phones, thanks to Project Treble.

Recent Apps, system navigation, and the settings have seen major upgrades; other than that, it looks a lot like Preview 1.