Philadelphia as a city has greatly improved over the years with a huge influx of yuppies moving in for lots of cheap housing and a growing food/art scene. Vacant lots in fringe neighborhoods that sold for 5k in 2010 now go for 90k. There are multiple Fortune 500 companies and endless monied suburbs feeding the airport. Big money being thrown at the river front and spec housing in former ghettos. Actual foreign tourists too

your description more closely resembles Baltimore than filthadelphia