Tow of the three stores I used to work at in the philliadelphia area closed (Willow Grove & Exton), but others remain open - KP, lehigh, Montgomery & Springfield too I think. King of Prussia is the 2nd largest mall in the US and the TDS there is one of the older stores (meaning, it's been in that mall since 1990 or something, although it moved locations in 1999) so that one remains open.
Most of the TDS are trying to absorb those CMs from stores that closed.