Dolphin's Icon View, Gwenview, digiKam, Plasma's Folder View and the Open/Save dialogs' Icons View all have similar behaviour/goal: they show a grid of files in a specific folder, allow to navigate through the directory hierarchy and have contextual actions on the files.
Some offer features that others don't. For example Dolphin offers to show files in a list instead of a grid, while Gwenview lacks this feature.
By extracting and unifying the different implementations one could de-duplicate the code as well as unify the look and behaviour across applications while allowing easier maintanance.