Well, we have known that 'Microsoft Windows Redhawk' made a modest debut in Windows 8, there are slr100.dll and wcl*.dll, and they are use by two Windows component: PowerWmiProvier.dll and whealogr.dll. Although the functionality of wcl libraries are very limited and specific, the base runtime (clr) 'slr100.dll' and base library (bcl) 'wcl.dll' are still quite interesting.
One good thing about Windows 8 CP is that Microsoft symbol servers have PDBs for the dlls, and you can download them too http://msdn.microsoft.com/en-us/windows/hardware/gg463028, PDBs are quite informative to understand some internals of a library, so I extracted some info using Dia2Dump and DumpBin, pasted here:
as we can see, slr100 basically contains the execution engine and two garbage collectors, WKS and SVR, and it is designed to be run on just MinWin.
and the WCL basically contains the System namespaces and Windows namespaces, provides basic and low-level functionalities.
One interesting thing I seen in WCL is, it as Async/Await support, with the 'INotifyCompletion' interface which is new in the beta version of .NET 4.5, so we know that Redhawk is actually very up-to-date and in sync with the real CLR/BCL.