With no evidence to back me up, I can't really imagine Boston being a competitive commercial shipping or cruise liner port. What I can see Boston being competitive in, is shipbuilding. If, as was mentioned, container ship traffic increases tenfold, there will be a great need for better, newer ships. Or, Boston could follow a less industrial route and build various leisure vessels and smaller passenger ships. I could see the Seaport absorbing a lot of the business taken by Newport, New Bedford, and other smaller coastal cities around New England. Just need a shipbuilder to take that first step...