Interesting article, but I would have enjoyed it even more if it had discussed puzzle solving in video games. Although some people feel they're a waste of time, I beg to differ, as they can definitely put your brain to the test. The Legend of Zelda series is known for having incredibly challenging puzzles, some which even have multiple solutions.
The next time you go to your nearest video store, consider renting The Legend of Zelda: Skyward Sword. If you're looking for a way to challenge yourself, you won't be disappointed. Overall, it's good to know that the gaming industry isn't limited to mindless first person shooters.