Slot machines used to tower over casino floors in cabinets more than 40 inches...

https://gregorysimpressivenews.iamarrows.com/why-do-modern-casino-cabinets-include-internal-wiring-and-speakers

Slot machines used to tower over casino floors in cabinets more than 40 inches tall, heavy and immovable. Now, many games fit comfortably on a 6-inch phone screen, letting players spin reels anywhere