Gamer Geek here from a Gamer Geek family.
I agree with the article, for the most part--except for the holier than thou stuff about "well, I trust my kids to make their own decisions about screen time." I think that may very much be kid specific. I do think that whoever put the picture of the two LITTLE kids in there probably did it a disservice though; I also believe that the author is speaking of older kids when it comes to the managing their own time though. It seems to be written in frustration for screens being the de-facto scapegoat, and I can definitely understand that sentiment.
My kids do play "fighting" games (Super Mario Brothers who stomp on people, Kirby who eats people, Super Smash Brothers Brawl, ect) and have played the multiplayer Halo (more strategy than blood splatter--I wouldn't let them play the story game). They also love Portal 2 and other strategy games (but you can still "die"). We are terrible parents and let them watch (restricted to certain series of course) anime too, since they are nuts for it. But yet they get upset at "real" violence on the movie screen and are super sensitive to it because they have not been exposed to it (we don't watch TV and only occasionally go to the movies) really. My daughter, who has been playing video games since she was 4, cringed her way through the violence in the last Alvin and the Chipmunks movie because (part of it anyway) involved things appearing to happen to the actors. She also gasped and was shocked at the stepmother slapping the kids around in the old version of The Parent Trap. While kids may like to pretend a lot, and what they do often reflects in their play, thus leading adults to think that kids don't know the difference between video game happenings and real life--I think that's a crappy assumption that kids are stupid, and that it's also an untrue assumption.
I also see the author's point about the books. I know that I am weird, but I am an extremely visual person, so when I was reading stuff like Crime and Punishment and Anna Karenina when I was 12 and going through my Russian Literature fangirl phase, I found those just as scary and disturbing as the Nightmare on Elm Street movie that I saw later that year. Even contemporary stuff, like Ender's Game (one of my all time favorites at that age!) and stuff I snuck out of the library (like the Flowers in the Attic series ) had just as much of an impact on me at 12 than anything I watched on a screen. Can't say much to Shakespeare, I didn't really enjoy the plays until I was older and could hear them performed--for whatever reason reading a play script doesn't do much for me (and not for MANY youngsters I'd think--which is why I would support bringing out the evil screen to SHOW the plays in addition to reading them, like all my best teachers did).
While kids do have greater exposure to screen time, many also now do not live in an area where it is feasible/have parents who would allow them even if it was to a) bike to the store/park/pool/friends house on their own, b) have the space to roam/build forts/ect that are more big kid things to do than just a swingset. Kids seem to be funneled more into organized activities in the privledged set (I live in the suburbs, so I consider myself privleged here and cannot say I feel comfortable speaking about those who are not), like soccer, swim team, dance, ect. which when combined with school seems to leave them with very little time to just fart around, and screen time becomes the down time for convenience/to cut down the whining of 'I'm bored'. I think it's that kind of thing that contributes more to obesity/kids with no tolerance for boredom/kids who seem clueless on how to entertain themselves than the screen gadgets themselves. Much easier to blame the screens though.
DH and I have a very liberal hand in what we allow our kids to do during screen time (except for ultra-violent stuff, they're not going to be playing Saints Row or anything, sorry; and we limit sexual innuendo stuff, like what happens in SWTOR/Knights of the Old Republic, even though our kids are Star Wars nuts...I'd be comfortable letting them play that once they're in their mid teens though). We're even more liberal with books/music. OTOH, we make sure they get to experience being "bored" a lot since we can't afford to put them all on 5 elite sports teams, ect. We have property so they can run around in the woods, and we allow them to use (non-power) tools to build structures, ect. Obesity and inability to entertain themselves is not a problem here, not because we're so great or my kids are perfect but they seem to have had just more exposure to figuring that out on their own than their peers.