Windows 8 will allow more easy access to the contents of two important storage formats, ISO and VHD files.

With Windows 8, you can simply access the contents of the ISO file without needing either needing to burn a new disc or needing to find/download/install additional software just to logically access the ISO.

Full read: Accessing data in ISO and VHD files - Building Windows 8 - Site Home - MSDN Blogs