The effect of computer games on education is probably also tied to when the person is exposed to the particular games.

As a kid, my best friends and I spent ages playing every manner of strategy game out there, from Red Alert to Alpha Centauri. In retrospect, we've come to the conclusion that those games taught us invaluable lessons about what it takes to analyze new situations for optimum strategies, and how to balance competing demands of time, resources, attention, and effort in the pursuit of several related goals at once.

Of course, this doesn't apply so well for studying quantum mechanics, but for learning project management, it's amazing.