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

https://lorenzosnewblogs.nexorafield.com/posts/why-do-mobile-slots-need-bigger-buttons-than-you-expect

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