ReFS (Resilient File System) Support, Metro Settings Changes
On the technical side of things, it seems that Microsoft's new file system, ReFS (Resilient File System), is going to be supported for desktop deployment, making the jump from Windows Server 2012. Choosing to format a hard drive in the Desktop File Explorer now allows you to choose either NTFS or ReFS as a format option.
So, what does this mean? Well, ReFS shares some of the features of NTFS, but is designed (in combination with the Storage Spaces feature) to be far more stable, resilient, and scalable over much larger data sets. Numerous writeups on MSDN and TechNet talk about the advantages of ReFS and its characteristics. Of note is that ReFS (at least as deployed in Windows Server 2012) is not supported for removable drives, nor for boot drives, so while a newfangled file system is on the horizon, NTFS won't be going away any time soon.