The Windows 10 October 2018 Update (a.k.a. Version 1809) is now available along with the Windows 10 SDK (10.0.17763). The new SDK can be installed via VS 2017 (15.8.6 update or later) as an optional component under the UWP workload, as an individual component, or as a standalone installer. This release includes some updates to DirectX 12, DirectWrite, DXGI, and DirectXMath. See What’s New in Windows 10 for developers, build 17763.
DirectX Raytracing: This release of the OS and SDK includes DirectX Raytracing. For more details, see this blog post.
VS 2015 Users: The Windows 10 SDK (15063, 16299, 17134, 17763) is officially only supported for VS 2017.
C++/WinRT: The C++/WinRT headers included in this release of the Windows 10 SDK have a number of updates and improvements, with a few breaking changes. For details, see the docs.
Samples: The following GitHub repos have been updated to use the Windows 10 SDK (17763) release: DirectXTex, DirectXMesh, DirectX Tool Kit (DX11 / DX12), UVAtlas, DirectX-Graphics-Samples, Windows-universal-samples
Related: Windows 10 SDK RTM, Windows 10 SDK (November 2015), Windows 10 Anniversary Update SDK, Windows 10 Creators Update SDK, Windows 10 Fall Creators Update SDK, Windows 10 April 2018 Update SDK, Windows 10 May 2019 Update SDK