Microsoft has released their first Windows 10 21H1 preview today, build 20150, to Insiders on the Dev (Fast) channel. Microsoft is rolling out some new features for the Windows Subsystem for Linux that allow you to configure it from the command line and use Linux applications that use a GPU, such as TensorFlow. Microsoft recently overhauled the Windows Insider program to move away from rings and to channels, as listed below. The release is mostly bug fixes, but Microsoft states that with this release, they have improved performance in the search box.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-the-first-windows-10-21h1-preview-build/