Let's stop making games for kids, and take away a strong demographic that sells games. The same demographic that grows up playing those games, slowly gaining interest in deeper storyline games. May as well stop making movies for kids, nothing that would get rated G or PG with nothing but action or family comedy. Speaking as someone who grew up playing games from the Atari 2600 days, this guy is a flaming moron. He probably thinks that current BMW commercial is awesome and the art that's made is spectacular. Granted I like the paintstyle on the car, what's put on the giant canvas and that sketchbook is GARBAGE.
I have my doubts that someone can make a game with an actual gripping story, while also maintaining the fun quotient of the game. If this guy can make a game with a lot of the same drama as The Pursuit of Happyness, and keep it fun, therefore guaranteeing sales, I will change my mind. But frankly, this guy needs to change his prescriptions and stop trying to tell the whole industry what to do. Do it yourself, that's fine, and when you go in the hole, oh well. But don't try to change a policy that sells games for everyone.
Let's put it in a different perspective. To have a level of storytelling that David Cage wants, there has to be limits on the choices a player makes to the end. Anybody plotting the story will not want a drastic difference possible to where their endstory isn't told. And even with adult gamers, that is a suicidal choice with the current demand for sandbox games and open-ended gamestories. One way this could work, is by being able to not worry about the ending, and just being able to really set up a good plotline in the early part where the player connects with the characters, as they would in a book or movie. But to keep the gameplay interesting, the writer has to be able to let go of the playable character, set them free to make choices, based on how the player perceives the character. These days I am just not so sure that many writers can let go of their character that way. It's easier when you don't develop a strong story around them.
Maybe down the road something can be discovered to make this work, but to just try to change everything for that, it's still idiotic. David Cage is welcome to work down this path, and see if it works, but don't assume that's the only way to make games work. Silly as it is, I will still play my Super Mario 64 or even Adventure.