There are some traces of new file system in Windows 8, called “Protogon”.
This is what exactly ITworld’s Sando Villinger mention in 10 hidden features in Windows 8 post.
“I’ve also dug up traces of some underlying file system changes that I couldn’t quite make sense of, such as an entirely new file system driver called “NT Protogon FS driver”, which looks like a kernel mode driver for some sort of (yet unknown) file system called Protogon. It’s unclear, whether this is a major new file system or just some minor subsystem.”
Is it going to replace NTFS or is it just a minor file system? Answers are not clear in thi stage and it is too early to predict.