Residential -- 80 floors of new building complete, 270+ under construction, 900+ proposed
Commercial -- Cira Center complete, 80+ floors under construction, a few hundred proposed [images of slot designs also included here, but not countable]
Residential conversion -- hundreds of floors of commercial and older residential buildings on their way to more stylish living spaces
And that deluge is without the (additional pages of) new buildings planned by various local campuses, hospitals, museums, and other institutions. Ten years from now, the city could have a whole new face (and/or a housing glut, but I won't hold my breath)...
(thanks to Philadelphia Will Do for the reminder/pointer)