Would be nice to calculate a running sum. You can do it with a regular sum field on a connected object but this only works if the records are added in order, which isn't a true running sum.
This feature is absolutely essential for a lot of tasks that involve reporting on employee hours, billing, AR, and a lot of other top priority company management tasks.
Would be very useful.
This running total is very much essential with filter option. I am doing a workaround in my app which makes the app very complicated and highly slow in execution!