Steven Sinofsky posted another update on the Building Windows 8 blog, this time showing the improvements in Windows Explorer

Windows Explorer is a foundation of the user experience of the Windows desktop and has undergone several design changes over the years, but has not seen a substantial change in quite some time. Windows 8 is about reimagining Windows, so we took on the challenge to improve the most widely used desktop tool (except maybe for Solitaire) in Windows. Alex Simons on the program management team authored this post with a detailed look at the evolution of Explorer and the major improvements to its interface and functionality for Windows 8. Judging by the passion on file operations and user interface design, we know this is an important subject so we expect a pretty engaged dialog on the topic.  We put this in one lengthy post, will watch the comments and dialog, and down the road we'll continue the discussion.

  Windows 8: Improvements in Windows Explorer