One of the things that separates different generations these days are their memories of what television looked and sounded like—even what it smelled like(!)—when they were kids. People my age remember massive wooden consoles with a dense, curved glass TV screens. They made a hollow sound when turned on, and we peered into them like shaken snow globes as the picture slowly emerged from a noisy sea of static. With the smell of heat and burning dust rising from...