Why on earth do we still have snail mail? For packages? OK. But everything else, really? All the paper, all the transportation, all the man-hours delivering to you thousands of little pieces of paper every year. All of that could be easily digitized...but no. Even with all the glory of e-mail, mail volume is still increasing.
Zumbox hopes that you will soon be receiving notices in the mail along with your bills that say "this piece of mail was also delivered to your Zumbox." If you go to your Zumbox and pick it up, you can select to only have that company only deliver mail to your Zumbox, and not to your physical address.