Christmas shoppers in Sears waiting for a turn at the “arcade,” via the Billings Gazette. That was a big TV in ’77. See more demo units here and here. Watch a Tele-Games (Atari 2600 clone) commercial from the same year here.
Demo units were extremely important to the early console industry. Many of us were introduced to various games and systems while dad was shopping for tools. The real arcade was usually not too far away, but it wasn’t portable, and it didn’t allow for endless play.