I kinda hope the NJ side follows something similar to Tornoto where there are big highrise clusters scattered. Its kinda getting like that, but not on that level. If Newark starts to boom, and as Jersey City has more infill further from Exchange Place, I can see that happening. The Gold Coast is always adding new towers but I'd like to see it become a little more aggressive. Likewise for Paterson. In terms of NYC, the East New York rezoning has the possibility to add more high rise clusters. Queens also has the potential to add high rises in areas that are predominantly lowrise.
Flushings Queens is like its own city as well. Quite a lot of infill is going on. With JC, I can see it becoming much denser as its an extension of Mahattan, its starting to feel like it, and the somewhat lower prices (although getting kinda high) will attract newcomers.