I'm trying to figure out the business sense of this.
>It obviously costs something to implement. What is
>the expected (long-term?) payback? Do they expect to
>eventually allow people to READ their mail BEFORE it
>is delivered? Simply knowing that <something> is
>on its way doesn't really seem to be much in terms
>of added value...
Informed Delivery
Informed Delivery can act as proof of delivery in case the mail or package is stolen. I've been told (and have not confirmed) that the USPS photographs and archives everything that is "interesting" which is delivered to a mailbox. Because they already do most of the work, the added cost of giving customers access to the information is very small.
I've been using Informed Delivery for the rural mailbox for mail addressed to my physical home address since the service was announced. For everything else, including packages, I use my PO Box address.
Guide to Post Office Box Street Addresses (PBSA)
Street Addressing Service for Your P.O. Box
Mail theft was a big problem for me until I began renting a PO Box. Unfortunately, the service costs me $216/year. My rural mailbox is located at an inconvenient distance from my house because the letter carrier will not deliver on my marginal owner maintained dirt road (even though UPS, FedEx and others do deliver).
I thought I could survive without the rural mailbox and use my PO Box for everything, but that didn't work. There are some companies (Amazon) and government agencies who refuse to deliver to a PO Box. When something important is delivered to my rural mailbox, I am notified via Informed Delivery. I then rush to the rural mailbox before the thieves arrive. Otherwise, I wouldn't know anything had arrived until I eventually clean out the accumulated junk mail.