I love the columns like that. I love the way the whole thing meets the street, and the way it references the Cesar Pelli building without aping it. In fact, I'm I'd never heard of this architect before, but I did a quick search and they've done some pretty dope stuff. This particular design looks a bit like something you'd see from Morphosis.
Anyway, it's awesome to see Philadelphia develop another node in its skyline, which, though quite nice, has never really said "Top 10 Most Populated American City" the way one might expect. Moreover, it happened on an empty, awkward site.
I don't know much about the project, but it appears to be part of a master plan for that area, one that includes two more high-rises (as far as I can tell, anyway). Is that right? If so, is there a timetable for the other two? ETA: Found my answer.