Microsoft blogger Steven Sinofsky talks about improvements made to the file management basics in Windows 8, you can read it over here.
Copying, moving, renaming, and deleting are far and away the most heavily used features within Windows Explorer, representing 50% of total command usage (based on Windows 7 telemetry data). For Windows 8, we want to make sure that using these core file management commands, which we collectively refer to as “copy jobs,” is a great experience.
We know from telemetry data (which is based on hundreds of millions of individuals opting in to provide anonymous data about product usage), that although 50% of these jobs take less than 10 seconds to complete, many people are also doing much larger jobs, 20% of which take more than 2 minutes to complete. Prior versions of Windows Explorer can handle these kinds of jobs, but Explorer isn’t optimized for high-volume jobs or for executing multiple copy jobs concurrently.