Yes, I can see the interest. It seems to me that is is a slide-show, just done with newer technology that makes it more practical in more settings.
There are of course pros and cons, aside from the cost etc: a photo i viewed for as long as the viewer wants. A sequence of photos, unless you offer a button to the viewer, requires watching for the duration of the sequence. It's a disadvantage shared with video.
They are different, but legitimate ways of showing images, me thinks.