Slot machines started as giant cabinet beasts, sometimes towering over 6 feet...

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

Slot machines started as giant cabinet beasts, sometimes towering over 6 feet tall. Now, those same games fit in the palm of your hand on screens just 6 to 7 inches wide