Just managed to dig this up. Very interesting.
Windows 8: New "Protogon" filesystem could be the next big thing - Neowin.net
I'm going to attempt to reformat a drive now just for the sake of it
We wish we knew exactly what's in store here, but we've found some exciting tidbits in Windows 8 that indicate that Microsoft's top-secret new filesystem -- Protogon -- is finally coming to fruition as part of Windows 8.
Windows 8: New "Protogon" filesystem could be the next big thing - Neowin.net
I'm going to attempt to reformat a drive now just for the sake of it