For most people, the Lake Geneva is a place for sport, leisure and excursions. The stately white boats of the Compagnie Générale de Navigation (CGN) call regularly at Ouchy, and will take you to Morges, Rolle, Nyon, Genève, Evian, Montreux, Vevey... and many other ports in Switzerland and France.
An ecological and friendly thing. Some boats driven by solar energy and answering to the suggestive name of Aquarel plies in the Lausanne-Ouchy region.