Slot machines used to be huge, bulky cabinets that took up 40+ inches of casino...

https://alpha-wiki.win/index.php/Why_Do_Slot_Machines_Have_Such_Bright_Lights_Compared_to_Phone_Games%3F

Slot machines used to be huge, bulky cabinets that took up 40+ inches of casino floor space. Now, many games fit comfortably on screens as small as 6-7 inches, right in your pocket