I can't remember what Eye of Gnome is called in the shell, but it's probably something like Photo Viewer. I agree which you that Mac OS and Windows do this as well, but Windows at least calls it File Explorer, instead of just Explorer, at least on the graphical side. I think that Gnome and maybe also Pantheon do this best, with descriptive names that help new users, with code names that are used in the terminal, I suppose to differentiate between maybe Dolphin and Nautilus if someone has both installed.