I work in a school, I know a lot of students and have seen a lot of students come and go over the years. The kids who are most involved and have the strongest, more meaningful friendships are in general, not the kids whose lives revolve around television and electronic devices. Granted, electronic devices are more important in today's world, but there's very little that's important on them for children that requires a lot of bandwidth.
The "go outside" was meant as a bit of hyperbole. The role of the parent should be to encourage as much development as possible for the child - learn new hobbies, learn new skills. Get involved. A large percentage of kids at the top of their class don't leave the school at 3pm. Sports practices, quiz bowl teams, FFA stuff, school musicals, etc. I teach at a small high school. 300 kids. This Spring, in addition to the golf team, baseball team, softball team, and track team, the 2 year old trap shooting team will have 50 members. That's 1 in 6 students is on that team alone. Then, there are all sorts of other things that kids get involved in; quite a few spend a bit of time volunteering for various things. Spend 4 hours a weekend, once a month at the SPCA and see how well that boosts you in the rankings for scholarships - many if not most scholarships and universities are looking at how much community service students have done.
And, for the kids in the country, there are a lot of opportunities that many kids in the city will never have a chance to enjoy - building a tree fort, they made their own motocross track (and destroyed a riding mower and bent up my tractor bucket a bit in the process), hunting (on their own after a certain age), they learned to use a lot of tools, and often, powerful tools. And yes, occasionally they played video games - but it was a tiny percentage of their time, and they never whined that "I can't go on an 18 hour quest on World of Warcraft this weekend. My life sucks." They had friends - and it required us driving them to their friends' house or vice versa. And, yes, they played outside in the winter time. Somewhere around here I have a picture of the giant snow penis my son and his friend constructed. Got a call from someone on the town board pretty quickly over that one.