TVs that give people a much better viewing experience. But
The development of the television was a long process that began in the early 19th century. The first primitive "televisions" were made of a spinning drum with discs on it, each disc hosting an image, which could be seen by everyone in the room. These "perspective" systems first appeared at least a decade before 1855 and had demonstrated the principle used in modern TVs: sending an electrical signal to light up each individual pixel on a screen. But in those days, no matter how primitive the image might have been, it had to be visible from the same angle as the user's eyes. In 1884, Russian inventor Pavel Florensky transmitted signals over a two-mile-long wire to light up a picture of his factory in another room. Florensky also introduced the first system that could be used at home: more than 50 light bulbs sent pictures by wireless telegraphy to flat screens with prisms that direct each of the individual pixels in line with your eyes. Image source: https