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Here are four inventions that debuted at the World's Fair.

General Electric Company (backed by Thomas Edison and J.P. Morgan) had proposed to power the electric exhibits with direct current originally at the cost of US$1.8 million. After this was initially rejected as exorbitant, General Electric re-bid their costs at $554,000. However, Westinghouse, armed with Nikola Tesla's alternating current system, proposed to illuminate the Columbian Exposition in Chicago for $399,000, and Westinghouse won the bid. It was a historical moment and the beginning of a revolution, as Nikola Tesla and George Westinghouse introduced the public to electrical power by illuminating the exposition. All the exhibits were from commercial enterprises. Thomas Edison, Brush, Western Electric, and Westinghouse had exhibits. The public observed firsthand the qualities and abilities of alternating current power.

Eadweard Muybridge gave a series of lectures on the Science of Animal Locomotion in the Zoopraxographical Hall, built specially for that purpose on Midway Plaisance. He used his zoopraxiscope to show his moving pictures to a paying public. The hall was the first commercial movie theater.

The Electrotachyscope of Ottomar Anschütz was demonstrated, which used a Geissler Tube to project the illusion of moving images.

Along the banks of the lake, patrons on the way to the casino were taken on a moving walkway the first of its kind open to the public, called The Great Wharf, Moving Sidewalk, it allowed people to walk along or ride in seats.