Among the changes coming to the SDK with Windows 10 April 2018 Update are new machine learning models and the Timeline features. Elsewhere, users will find user activity tools and new UX controls for the platform. Microsoft has published a changelog for the features in its announcement:
Installation
Depending on your Visual Studio build, there are different ways to download the SDK. If your running VS 15.6, you can download the Windows 10 April 2018 Update SDK from here and simply install it. When VS 2017 15.7 is released, you will need to find the installer and download it. Once downloaded, select “Universal Windows Platform development” under Workloads and install the update.