Slot machines used to take up entire casino floors with cabinets over 50 inches...

https://marcoscooljournals.lowescouponn.com/why-do-some-slot-machines-have-40-inch-screens-now

Slot machines used to take up entire casino floors with cabinets over 50 inches tall. Now, these games have shrunk to fit comfortably on phone screens just 6 inches wide