There are lots of experiments and even production ships with sails these days. Google for "sails on container ships" for lots of nice pictures and articles.

The sails don't look like historic sails - they are often rotors that look like cylinders.

Maersk's Pelican, for example, is supposed to get 10% from its rotor sails.

Tangent: why do wind turbines look so conventional, with their propellers? There is a lot online about vertical axis wind turbines etc, but I've never seen one.