All objects belong to a workspace, and sometimes there is a need to bring attributes of the workspace into worksheet custom fields, and in particular to display them in a report that has other object workspace fields already incorporated into the report. The below link is for another idea that would allow us to add to a report the workspaces for more than one object (i.e., Initiative workspace and Epic workspace), and since that is not doable, this idea will give us a workaround, which allow us to add the Workspace name as a worksheet custom field that allows us to display on the reports.
Aside from this particular need, and given that every object belongs to a workspace, it would seem intuitive to allow worksheet formulas to add workspace fields for these objects just like it allows us to add releases and initiatives for epics.