You are so right! My son, addicted to PC games, cause we let them play during weekends for an hour per day.
One time, their school scheduled a Family Fun day which involved outdoor and indoor games. When we were about to prepare to go to that said event, I told my son to eat a lot so he can stack energy for the games. He answered me "Why do we have to eat a lot just to play computer games?" haha He thought the games that were mentioned were all computer games or just didn't know that there games that can be done physically.