It is yet another interesting way to deal with stitching technique
My current favourite is still the multi focus:
You create a set of extremly shallow DOF shots and bring two
different levels to focus/interest, leaving the space inbetween
blurred. I first saw that 12 years ago done by Willem van den
Hoed which got me investigating further into that. You can stitch
these by hand or use some advanced features of specialized
software like Kolor Autopano.