Slot machines once towered over casino floors with cabinets more than 50 feet...

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

Slot machines once towered over casino floors with cabinets more than 50 feet tall or screens over 40 inches wide. Now, many games fit comfortably on phone screens just 6 to 7 inches across