Here would be a good use for it:
Archivist Quest! Find the rare Puppies! (Image Heavy!)I could put spoiler tags up and people can only view the section they want instead of thier computer having to load every image.
Or anywhere anyone wants to use a large image, many images, discuss about a book or movie in general chat etc. There's pleanty of places I use it on other forums. Would be a nice feature for here.