In columns and rows in board view, a configurable aggregate field can allow for aggregate calculations like total, average, etc. of any specific field of the items that the column contains in any given filtered or unfiltered view. For example, total number of estimate points or hours or time remaining for items.
WIP Limit - style limits can be configured too, that will visually show if such a limit has been crossed by the calculated total.
This is an essential feature for sprint planning or any timebox planning.