Slot machines used to fill casino floors with massive cabinets often over 50...

https://www.slideserve.com/abigail_gray10/how-close-do-you-hold-your-phone-when-playing-mobile-slots

Slot machines used to fill casino floors with massive cabinets often over 50 feet tall in early designs. Now you can play those games on screens as small as 6 or 7 inches right in your pocket