This is just my opinion, but despite my appreciation for the Metro interface (I like it, I can't wait to try it on a tablet), Microsoft's justifications for the various "improvements" made to Windows 8
Explorer (see the MS blog linked above) are specious.
They (meaning the MS team as expressed in the blog) seem to interpret usage data according to the UI paradigm that management is currently pushing (AKA the "ribbon", first forced on Office users). For instance, much is made in the blog of the data that says Explorer users resort to the context menus instead of the toolbar for the most frequently functions... and this is somehow a bad thing?
The blogger is right to claim that one reason for the heavy use of the context menu (vs. the toolbar) is that the appropriate functions are simply not present on the toolbar (well, duh)... hence the justification for incorporating the ribbon into Explorer. But perhaps the real reason is that the context menu is simply more efficient to use. After all, one does not have to move the mouse to access it.
Here is my thinking, ribbon vs. context menu for mouse users:
Context menu
- 1. Use mouse to select file(s)
2. Right click
3. Scan linear list of functions (in menu)
4. Move mouse down through list to select one item
5. Click left mouse button
6. Perform function
Ribbon
- 1. Use mouse to select file(s)
2. Scan ribbon surface looking for icon of needed function
3. I know it's in there somewhere
4. Damn, let me look again
5. Is that it?
6. Move mouse toward icon
7. Miss the icon by a small amount, click on incorrect icon by mistake
8. Press [esc], or move mouse to undo (where is undo?) and...
9. Rescan ribbon
10. Oh, maybe it's on another ribbon tab...
11. Scan ribbon tabs/categories
12. Move mouse to select a ribbon tab
13. Scan new ribbon for function
10. Ah, there it is, finally!
11. Move mouse toward icon
12. Careful, now
13. Click left mouse button on icon
14. Perform function