Guest blogger Giovanni Savino writes: After binging for several hours in the photo-technological kaleidoscope of the PDN PhotoPlus Expo at the Javits Centre I was starting to feel a bit dizzy.  So I decided to head home to digest the great quantity of new gizmos I had the opportunity to admire, and to reflect on several evolutionary aspects of the business of photography I kept seeing all day long, while bouncing with the crowds, not being able to find the…