A desktop for most people is a crutch (plunger) for their disorganized computer (clogged toilet). I think the suggestion that desktops aren't necessary is a good one.

Several years ago, I started turning desktop icons off (both GNOME and Windows make this easy) and it really helped my organization, as I was then forced to competently organize files into Downloads, Documents, Pictures, Videos directories instead of vomiting everything onto the desktop. Simply _knowing_ where files are located is faster than scanning a cluttered desktop.

As a bonus I don't ever have to worry about the positions of my desktop icons changing.

File picker definitely needs thumbnails though.