According to the release notes, the Radeon Software Adrenalin Edition 18.5.1 WHQL driver adds official support for the Windows 10 April 2018 Update and the PlayReady 3.0 support for desktop Polaris-based graphics cards - RX 400 and RX 500 series.
The RSAE 18.5.1 WHQL driver also brings optimizations for Ancestors Legacy game providing up to 6 percent performance boost on the Radeon RX Vega 56 8GB and up to 13 percent on the RX 580 8GB graphics cards.
There are also several fixed issues, including one with HBCC options reset, fix for increased load times in Destiny 2, fix for tearing issues in borderless fullscreen games on Radeon FreeSync screens when Radeon Software performance metrics is enabled, fix for Netflix playback in a web browser on multi-GPU systems with RX 400 or RX 500 series graphics cards, fix for ReLive streaming or uploading to Facebook, and a fix for brightness or white screen issues in The Crew game.
Hopefully, AMD will keep including its APUs in the future driver releases as suggested by AMD's James Prior earlier.
You can check out the release notes as well as download the new Radeon Software Adrenalin Edition 18.5.1 WHQL driver over at AMD's support page.