Companies often use call center functionality and retail periodic discounts to offer more complex prices and discounts to their B2B customers. In some cases the company policy requires prices and discounts calculation to be based on today's date (this is how the retail periodic discounts work now). But in other cases the company wants to calculate prices and discounts based on Requested ship/receipt date which is currently not supported for call center sales orders.
It's good to have an option to set Requested ship/receipt date as a parameter for calculation of retail periodic discounts.