Not a parent answering, but a gifted former child...video games can be a wonderful gateway to lots of fun educational tech stuff. When I was 10, I did a two-week summer program at my city's science museum where we designed a video game from scratch. We did everything from programming to level design and graphics ourselves - building skills (now that I look back on it) in art, maths, logic, language, and other areas. I also got into web design, which turned into an educational hobby and later a business - while my high school friends were getting minimum wage at McDonalds, I was getting $50 an hour for building websites, plus I had to learn a bit about business to do my own marketing, invoicing, etc.
Beyond that, I would suggest you do some research into video games (or better yet, join in your son's interest and explore them yourself) that are not designed as "educational games", but have plotlines that prompt the player to think deeply about the story and their own choices. For every "Die Hard", there's a "Dead Poets Society", and the same is true of video games.
