oh well, that MJF article actually links back to a post of me here in coffeehouse
And no, Redhawk has nothing to do with WinRT, currently it does not even support WinRT. Its a 'minimal runtime' that Patrick Dussud built to make type-safe/memory-safe runtime/language more appealing for Windows low-level components developers in WinDiv, its begins as a result of Longhorn Reset, as CLR failed to fullfill the needs as planned for Longhorn.
Actually, if you watch this video again http://channel9.msdn.com/shows/Behind+The+Code/Patrick-Dussud-Managing-Garbage-Collection/
26~35min Patrick Dussud described the problem CLR has and how he want to improve the situation with a minimal runtime, and that's Redhawk.