My implementation would be for high volume photography (sorting/post processing)....
If I can get the image name, as the picture is taken, to be sent to a tethered android tablet, I would be able to sort images almost instantly later in my workflow...
example... If "Bob" is the subject that I am currently shooting, I could select his name on a companion tablet app (yet to be developed) and then start shooting...every file name would then be placed in the "Bob" folder....then repeat for "jane", etc...
Then, when I get home...dump the data and the pics and I can simply write a bit of code that looks at the data and sorts, tags, adds exif data (whatever i need to do) b/c i would know exactly which files (by name) belong to "bob". "jane"...etc...