I hate folders on my computer desktop. Once you put stuff in there you have to think up a name for all the contents and they suddenly become invisible.
Rather than create a virtual paperclip (Microsoft already messed that one up), today’s invention is a transparent envelope.
Clicking once on the envelope would visually shuffle the contents enough to remind me what was in there. This would allow me to hold together documents of every file type on my desktop in such a way that I can still identify where things are at a glance.
I might later choose to file the results of my work in an old-fashioned folder, but for work in progress a clear envelope would be a useful tool.