For the previousely mentioned reasons, UPS, FEDEX and the american public will tend to be the winners in this move. If the USPS volume remains constant, then purple will see little change and may find ways to more efficiently move the mail. If the USPS volume drops, then express services may see a pickup(electronic data transfer may increase some also). Regardless, any time a congressional mandate is removed(6 day a week delivery) the public usually wins.