That's a pretty general question, and looking into the future isn't particularly easy.
There will always be a need for longshore workers. I think we can say that no matter what happens with the possibility of more automation, but like almost every business, there are changes in technology and the changes in technology often lead to improvements in productivity.
I think it would be reasonable for the terminal operators and the port authorities and so on to be looking at the sensible introduction of technology. Hopefully, that would make the productivity of the longshore workers better.
I can't give a more precise answer than that.