To me it looks like the end of a run. Where do commuters go afterwards to proceed into NYC?
Then, from the train platforms, you walk downstairs to the NJ Path platform, which is a subway-style train, and go under the river either to midtown or the world trade center.
There are also ferry boats in Hoboken that go to various ferry docks in Manhattan, but they are expensive.
Not the Trenton trains. They go into Newark/Penn and then New York/Penn.