Microsoft today released Windows 10 SDK Preview Build 17666 to developers. This SDK can be used with the recently released Windows 10 Insider Build 17666 or later. And this release includes bug fixes and under development changes to the API surface area. This Windows SDK will now formally only be supported by Visual Studio 2017 and greater.
This release contains the new LauncherOptions.GroupingPreference property to help your app in tailoring its behavior for Sets. Watch the presentation here for more details.