Subject pretty much says it all. We would like to allow for a timespan to be used as a value on a date field in conditions. This would allow for time to be assessed to and from a date.
For example: Due Date on a Request, possibly you could leverage this functionality to calculate a timespan from the open date to create a due date.
Another example: The Change Order has been approved, but after 12 hours after the scheduled end date nobody has progressed the Change Order. This would allow for a notification to be sent at the 12 hour mark after the scheduled end date.