Explain Ray Bradbury's Vision Of The Future In Fahrenheit 451

To what extent did Ray Bradbury's vision of the future become a reality

In the book Fahrenheit 451 the character we follow, Guy Montag, a firefighter whose job revolves around people who are breaking the laws, reading books. In the future, a world is portrayed where people have lost a lot of their freedoms and with that, they also lost their sense of happiness and free will. At the same time technology has also advanced so much that all that is ever necessary can be gathered from a reach.
In Fahrenheit 451 technology is portrayed as such an advanced level One example is Mildred's walls, a very advanced cyber companion, the walls that are like TVs can replace walls in a room to create a virtual environment and create a more evolving form

Early in the Book Guy meets a teenage girl named Clarisse who has a free spirit and wanted to know why not just what. Beatty, Guy’s fire chief, forces the ideas that “She didn't want to know how a thing was done but why. That can be embarrassing. You ask why to a lot of things and you end up very unhappy indeed, if you keep at it. the poor girl’s better off dead” (Page 60). She does indeed end up dead as suggested (on page 47) by Mildred when Guy brought her up in conversation. Mildred is on the other side of the spectrum where most people are, satisfied with their lives. Lives enforced by the police hinted to by Beatty when he said “Remember, Montag, were the happiness boys” (on page 61), a world with enforced happiness by the ones who also control the censorship of the world, “protecting them”. Today's version though much calmer exists, through biases and difference of beliefs. People who are different are shunned, like all time, but a similar note is shown in media, that when someone has a different opinion everyone just assumes that their opinion is invalid and should be changed, instead of seeing it in their shoes, showing