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

https://station-wiki.win/index.php/Why_Do_Slot_Games_Look_Different_in_Portrait_Mode_vs._Landscape%3F

Slot machines used to take up entire casino floors with cabinets over 50 feet tall. Now you can play the same games on screens as small as 6 inches—right on your phone