I always said that Jersey City is the Taiwan of NYC. They think they are different, but really part of the motherland.
On the topic of highrise and skyscraper construction, I prefer to see more of it in the outer boroughs versus Manhattan. Its nice to see NYC develop into a Hong Kong or Shenzhen looking city where you have various nodes away from the central CBD. It adds to the larger feeling that the city extends in every direction. Its also really nice to look on both sides of the river(s) and see skylines that rival most cities.
I do wonder if tourists who aren't aware of Jersey City think that its part of NYC? I mean, they could be forgiven for thinking so.