[whpalmer4]

From the built-in Help:

Revert to Default View — If you’re not currently in a perspective, choose this to return the frontmost window to its original view settings (showing the remaining actions of active projects).

The behavior when you are in a perspective isn't described, but it appears to me that this command is intended to simply reset the view bar choices to a reasonable default, and not reconfigure the window in any other way.