Windows 10 (code named Redstone 4) version 1803, is finally available for download on MSDN. This is the successor to Windows 10 Fall Creators Update (version 1709).
It is also available for download here.
https://www.microsoft.com/en-us/software-download/windows10
Here's a video about the new TimeLine functionality incuded in Windows 10 April 2018 Update.
and for details about what's new, see here:
https://docs.microsoft.com/en-us/windows/whats-new/whats-new-windows-10-version-1803
To get the feature update via Microsoft Update see the following Blog Post:
https://blogs.windows.com/windowsexperience/2018/04/30/how-to-get-the-windows-10-april-2018-update/#.WudkRA_6qwM.twitter
and here is the Windows 10 release information for all releases of Windows so far:
https://www.microsoft.com/en-us/itpro/windows-10/release-information