Yes, but I don't need it that quickly, and a boat can carry hundreds, if not thousands of tonnes.
I imagine that most people with boats cherish their living space, but perhaps some cruise around with a usable hold. I would if I could. If a cargo wanted to go the same way I was going, it need not cost very much to take it aboard.
You can get flexitanks now which fit inside a standard shipping container.
All we need is robot piloted boats.
They're getting close to it with cars, so the technology cannot be far off. You would need some human input, but a couple of people could probably drive several boats with robot assistance.