Neighborhood Post Boxes
Snail mail has been going out of style for years thanks to the invention of text messages and emails. While post office workers will likely always have their jobs because of the need to still ship packages, mailing letters itself will probably cease to exist. Say goodbye to those corner mailboxes.
College Textbooks
Most colleges and universities offer online textbooks, which is a relief to students (and their backs) everywhere. That not only saves paper, but it also saves students and their families money. Most online books are much cheaper because it saves on printing costs.