One major prediction in the book is the advancement of television over reading. Bradbury based the book on what he saw as the degeneration of social interaction because of TV and radio; he recalls seeing a woman with a portable radio walking with her husband, and thinking her entirely cut off from reality. In the book, TV has almost replaced human interaction; Mildred is the best example, as she sees TV as being her "real family." Bradbury even predicts the Internet with his interactive TV scene; Mildred receives a script for an upcoming story, with missing lines:
"When it comes time for the missing lines, they all look at me out of the three walls and I say the lines: Here, for instance, the man says, 'What do you think of this whole idea, Helen?' And he looks at me sitting here centre stage, see? And I say, I say --" She paused and ran her finger under a line in the script. "'I think that's fine!'"
(Bradbury, Fahrenheit 451, Google Books)
This echoes video gaming, where people interact with each other only by digital connection, and often only with computer constructs instead of with real people. Bradbury foresaw the way that technology, and especially entertainment, can create a divide between human understanding of society, themselves, and each other. This overall prediction also includes the increasing size of TV and computer screens; wall-size TV screens are available, and more affordable. Some high-end hotels and resorts even have wall-size screens that change the scenery at will.
Other predictions include the constantly-increasing speed of the highways and movement towards government monitoring and control of information.