Microsoft has released Windows Insider Preview Build 16179 for PC and Build 15205 for Mobile to insiders on the fast ring. Of particular note is the introduction of Hyper-V snapshots and Power Throttling. The rest of this update is bug fixes and enhancements, which are detailed below. Microsoft is enabling the new feature for everyone starting with the previous build of Build 15002. The update also includes bug fixes, improvements, and fixes for PC, Mobile, and the Pro edition of Windows 10.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-insider-build-16170-for-pc-released-with-hyper-v-snapshots/