Each week, millions of people watch NFL games on their televisions or in person. Increasingly, they also follow the action on a second or even a third screen. Smartphones, tablets and computers let fans follow their fantasy teams, talk about football on social media or even watch another game, all from the stadium or the couch.
Fans are certainly aware of how technology has changed their experience of watching games. They may not always notice, though, how technology has changed the game itself