Activities are the defining feature of the KDE 4 release series. Yet, despite their potential, Activities remain poorly understood. Here is my wish list of improvements that would help Activities to come into their own:
1. Clarify Relation Between Activities and Virtual WorkSpaces
You can easily state the relationship between Activities and virtual workspaces. When used as intended by the developers, Activities are organized by tasks, and use virtual workspaces to organize the work of the moment.
However, the desktop itself fails to make the relationship clear. There is neither a pager nor any task manager setting that shows virtual workspaces as subordinate to Activities. Instead, virtual work spaces have their own pagers, and Activities are only displayed when you select Activities from the desktop toolkit.
Rest here