OEMs still have the freedom to add customization to the WMD, but those customization are the only thing an OEM is responsible for validating. At least in theory, this should result in more frequent driver updates.
With the release of the 18.104.22.16844 drivers, Intel is jumping on board the WMD train:
For its part, Intel is on board with the WMD initiative, and it plans to begin distributing Windows Modern Driver packages for compatible operating systems this month. The company released its first WMD driver today, although it's wisely using the Universal Windows Driver acronym to preface the version number of that release. Beyond the new driver model, UWD 22.214.171.12444 includes some new features and game support.
12 newly supported games “Rescan” button to detect newly installed games without having to restart the system