Slot machines used to fill casino floors in bulky cabinets over 40 inches tall....

https://touch-wiki.win/index.php/Did_Video_Slots_Make_Slot_Machines_Bigger_or_Smaller%3F

Slot machines used to fill casino floors in bulky cabinets over 40 inches tall. Now they easily fit in the palm of your hand on screens around 6 inches wide. This shift shows how technology has shrunken big machines into portable fun you can play anywhere