What if, I know this is crazy! BUT, what IF you showed the FILENAME OF THE FILE BEING WORKED ON SOMEWHERE IN THE WINDOW!!! WOULDN'T THAT BE INSANE????
Completely agree: Insane. And not only when editing: One of the most useful features is the ability to share an album online directly with a client - but without the option of having the filename showing (like the recently added filetype overlay) BOTH on the desktop and in lightroom on the web, communicating about images is so difficult, that it is near enough impossible. I actually love the simplicity and the fast workflow of Lightroom CC, however it is failing miserably on the simple things (anyone mention renaming files lately...? he he he).