Where was the first major public debut of television held?

The first major public debut of television was held at the New York World's Fair in 1939. This event was significant as it marked the introduction of television technology to a mass audience, showcasing both the potential of live broadcasts and the capabilities of the medium to deliver content. The fair featured demonstrations by companies like RCA, which played a crucial role in promoting television to the public.

This historical context makes the New York World's Fair a pivotal moment in the advancement of broadcast media, as it not only provided a platform for showcasing television but also influenced public perception and expectations of the emerging technology. Other events, such as those in Chicago, San Francisco, and Los Angeles, although prominent in their own right, did not serve as the landmark introduction of television to the public in the same transformative way that the New York World's Fair did.