Here's a great post from Katherine Hansen about different areas of visual storytelling. She discusses photographs, graphic facilitation, videos, museum objects, and clothing lines.
I think the biggest distinction to make here is that most visual storytelling (other than videos) are actually story triggers -- they trigger stories within us. They either remind us of stories we already know, or trigger our creativity to create new ones.
All of the areas Hansen talks about here are applicable to businesses. How are you using visual storytelling to trigger stories within your customers or prospects?