Screensavers were originally a way to prevent burn-in on older CRT monitors. The now-classic moving images in early operating systems were created to keep any single pixel on the screen from remaining in place for too long, leaving behind a ghost on the display. Modern screens like the OLED ones on Samsungs Galaxy S8 can also suffer from burn-in. Since the new flagships Home button is virtual now, the company had to do something to prevent it from getting burned in to your display. …Read more