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

https://celebmeadow.com/from-floor-standing-machines-to-pocket-screens-the-shrinking-footprint-of-slot-games/

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