A couple talks to a salesman about buying a color TV set. Over the years, televisions have evolved to include color, high-definition and 3-D models. H. Armstrong Roberts/ClassicStock/Corbis hide caption

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Despite having aired its final episode in May, the medical drama House lives on, in reruns and on digital services like Hulu, Netflix and Amazon Prime. But not every episode is available in all formats. Adam Taylor/AP hide caption

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Phil Coke and Miguel Cabrera of the Detroit Tigers celebrate after beating the New York Yankees in the American League Championship Series. Through the power of modern technology, fans could experience the game even if they weren't in front of a television screen. Jonathan Daniel/Getty Images hide caption

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In 1936, a television drew a crowd at London's Waterloo station. Today, the crowd would have video screens in their pockets. Fox Photos/Getty Images hide caption

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