Damon Darlin, writing for the NYT's The Upshot blog:
Bell Telephone’s Picturephone went on display at the 1964 World’s Fair, but it went into actual commercial use on June 24, 50 years ago. From a booth set up in Grand Central Terminal, a person could talk to a friend in Chicago or Washington while also seeing them on a small video screen. The friend would also have to go to a special booth in those cities to take the call. The price for the novelty of a three-minute call was $16. That would be equivalent to $121 in today’s money. Imagine if, today, you had to go into a special phone booth to make a FaceTime call.