Microsoft has released a test version of Microsoft Command Shell (MSH) to a select group of developers . The new MSH is inspired by the Linux/Unix shell and is destined to replace the old DOS command line in Windows. It is also aimed to give administrators powerful and complete command line-based control over computer systems rather than using the graphical interfaces.
Exact details regarding the launch of the Microsoft Command Shell aren't known.
This will probably lead to increased speculation that MSH will not be ready for public release in time for the first shipments of Longhorn - the next edition of Windows, whose last explicitly reported window of possible release had been the second half of 2006, but which may conceivably slip into 2007. However, Microsoft spokespersons have confirmed that the MSH project is progressing on its own schedule, thereby denying reports elsewhere that MSH will not be ready for Longhorn.
More details about the development of MSH can be read over at Tom's Hardware