Video games are incredibly powerful and sophisticated. Despite all of its history and baggage (all those WWII rifles and Pokémon are no insignificant burden) the video game is arguably the singular unique medium that can be considered a container for all other media that came before it.
Consider that back in the '70s, video games were generally conveyances for electronic gameplay and little else. When you bought a game for your Atari 2600, it went without saying that what you got was a system of rules, a goal that challenged you (with rare exceptions), and an interface to play within.
Video games in 2009 still largely feature those same essential ingredients, but technological developments over the past four decades have allowed our games to contain myriad other methods of expression that most of us take for granted.