With build 16188, Microsoft introduces new features in Microsoft Edge’s PDF Reader and Application Guard for Microsoft Edge. Application Guard allows a user to isolate a browsing session in its own Hyper-V virtual machine in order to protect Windows from browser threats. Microsoft Edge running in Application Guard provides enterprises the maximum level of protection from malware and zero day attacks against Windows. Unfortunately, this feature is not being added to Professional version even though it does support hyper-V. Unfortunately, it does not be available to users of Windows 10 Enterprise Edition.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-insider-build-16188-for-pc-brings-application-guard-to-the-enterprise/