I would like to add that our method estimates the scene in full 3D space. Have a look at the additional results, there are a few results that exemplify this when the geometry is a little more complex: http://sniklaus.com/papers/kenburns-results
I know a few online services that do manual (cutting in photoshop, setting on a 3D plane, etc) still photo to 2.5D parallax, e.g.:
https://sundstedt.se/blog/services/2-5d-parallax-3d-effect-a...
there are Fiverr gigs doing it, and tons of filmmakers (me included when I dabble with that), do it ourselves too (which takes time in Photoshop, Premiere, etc) from time to time (for news, documentaries, and such).
In fact I am about to pay a good 100-200 to have 4-5 photos done this way for a project...