Often a file name includes various information and that often in abbreviated form.
IMHO it would be nice if I could highlight parts of a file/folder name, specifying the substring to be highlighted with regex.
In this way I could emphasize or focus on the exact part of the name WHY a file is highlighted (if the reason for wanting to highlight it is in the name). Plus I could use different highlight colors on the same file name for emphasizing different keys inside the name.
Besides that, I could make my listers really colorful this way - joke, I know it can get colorful already.