Imagine your icons - your images and videos, but also your browser history and past versions of files - all arrayed on a timeline, oldest to the left, newest to the right. Finding what you were working on last Friday is a matter of scrolling back. Restoring previous versions of files just means scrolling back to where they were last changed. To remind yourself of something in the future, scroll forward and place a note there.
I don't doubt there would be some issues to work out, like finding a file if you don't remember when you last used it, or expiring old backups and managing hard drive space, but could you see yourself using a computer interface that was built around a timeline? It wouldn't have to be the only way, of course.
Mokalus of Borg
PS - There are a lot of ways computers could work better for us.
PPS - The main user interface usually only creeps forward in tiny increments.