Microsoft released Technical Preview update 1707 for Configuration Manager with some new features and improvements with its last Technical preview Update (1706).
These technical preview updates will help you to test in lab environment and report feedback to Microsoft before they make into current Branch (Production Version). You can install this version to update and add new capabilities to your existing Configuration Manager technical preview site.
To see these preview updates in your Configmgr console,you must have the base version of SCCM Configmgr Technical preview 1703 (not applicable to current branch).These Technical Preview updates are intended for use in a lab environment. For more information about technical preview and updates, please refer https://docs.microsoft.com/en-us/sccm/core/get-started/technical-preview
New features you can try out with this update are:
Client Peer Cache support for express installation files for Windows 10 and Office 365
Surface Device dashboard
Configure and deploy Windows Defender Application Guard policies
Add parameters when you deploy PowerShell scripts from Configuration Manager
For more information about these features ,read the documentation here https://docs.microsoft.com/en-us/sccm/core/get-started/capabilities-in-technical-preview-1707
I will be testing this update in my lab to see the new features and improvements especially adding parameters when deploying powershell scripts.