Point Breeze is the next G-Ho. G-ho is G-Ho because it is and always was a 10 minute walk to Rittenhouse Square. Pennsport is a 10 minute walk to Queen Village which, of course, is not the same thing.
Also, like PB, G-Ho was in somewhat abandoned shape at the turn of the century (2000)--Pennsport has always been pretty much a solid middle class neighborhood with sporadic development activity. In other words, there's just not the same opportunity for development that G-Ho had with its mix of empty lots and abandoned buildings. Will Pennsport activity increase? Sure, but reasonably and at the same rate as other fringe neighborhoods.