5. E. M. Forster Predicted Video Calling
The Machine Stops by E. M. Forster is an incredible sci-fi short story, first published in 1909 in The Oxford And Cambridge Review. The story is set in a post-apocalyptic world in which humanity dwells underground and is sustained by a massive machine. The story has been hailed for predicting technologies very similar to the internet and instant messaging, but one of its more specific predictions is that of video calling. In the story, humans live in cells underground and communicate with people all around the world through a machine which allows you to see the person you're talking to, no matter how far away they are.
"But it was fully fifteen seconds before the round plate that she held in her hands began to glow. A faint blue light shot across it, darkening to purple, and presently she could see the image of her son, who lived on the other side of the earth, and he could see her."
In the end the Machine fails, essentially destroying what remains of civilization, which has become so dependent on the machine. It's a fairly chilling insight into our over-reliance on technology, and was written almost a century before Skype was even a thing.