As of today, the Windows Management Framework (WMF) 4.0 Preview download has become available on Connect.
All functionality that’s available in Windows Management Framework 4.0 Preview is equivalent to the functionality found in Windows 8.1 Preview and Windows Server 2012 R2 Preview.
Now here are the Release Notes and personally I’m very glad Microsoft has released an additional guide for Desired State Configuration.
WMF 4.0 Preview can be installed on the following Operating Systems:
Wait… what? There isn’t a Windows 8 installation?
No, use the Windows 8.1 Preview.