> Okay? How will this actually change anything?

It's my understanding that lots of parents use these numbers as guidance. I will make my own decisions about what my child can play, but the ratings and all the labels makes it much much easier to make an informed decision.

For the parents that are not into gaming, being able to just go by these numbers is much better than having no such guidance.

> Does anyone do outside of fundamentalist parents who wouldn't let kids play most video games anyways?

Yes. In fact I believe they help breaking down the fundamentalism by making it so clear that gaming is not inherently bad or good for your child. It all depends on the content.