A hyperloop terminal would probably be located in a vastly less convenient location than Penn Station. I expect for many NYC residents it'd be a shorter trip to take a high speed train through the existing right-of-way than to take a hyperloop, similar to how it's often faster to take the train from NYC to DC than to fly.

I really do not see the appeal of hyperloop in any situation involving high density land use, and I also do not see how it could work in locations without high density.