“It’s neat, but how does the TV station know I turned this knob?”
- Pong early adopters

“It really was a world-changing event,” Pongrecalls Bushnell. “I can remember people saying, ‘It’s neat, but how does the TV station know I turned this knob?’ Their whole metric was TV signals came from TV stations. With Pong, it came from the game and that was a real epiphany. They didn’t understand how it was done. It was the staging for the personal-computer revolution to come.”

- Nolan Bushnell, inventor of Pong: link.

See also Pong @ Wikipedia.