Ships still consume oil, and whenever one of those super cargo crash in the ocean, it's an environmental nightmare. And even when they don't, they're still polluting a lot ( i know, not that much compared to other means and the amount of goods they carry).
There's probably still a way to carry goods from china to europe in a more environment friendly way...
Maybe a modern unmanned sailing ship would fit.
It probably gets less useful as ships get bigger though and there's a long history of trying this sort of thing without a whole lot of success. Modern systems do have better automation however.
> Circling the world four or five times a year, it can move 1.4 million tons of cargo annually. That’s the equivalent of 1.8 billion iPads.
Such a strange comparison.