It would be useful for creating lists of Board items where you need to remove, change or add to some of the content ie preparing a report such as a weekly task update.
It could be a widget for both chart/dashboard as well as in Docs. The list would be easy to copy paste as well as edit. This would allow items to be pulled into an easily editable format. Having it in Docs would also allow for ongoing reports to be kept in Monday ie a weekly report could be saved for historical viewing (instead of using the Board widget for example that only shows live data).