Video Games - what are the knowledge issues?

Are video games just another form of entertainment? What are the Knowledge Questions surrounding the production and use of games? Can gaming create altruistic actions such as fan-made non-for -profit games? Is it an ethical issue? Is it a question of time management or addiction issues? Is it no different to watching war movies? The point is to look at the issues around gaming and not simply indulge in lecturing teenagers about their use. Clearly this is an important issue which may be affected by confirmation bias.