It's completely inane, and utterly useless. The vast majority of video games played by kids are purchased by adults anyway, so even if there were a massive epidemic of 10 year olds playing San Andreas, this would do nothing to stop that.
Nor is there a massive epidemic of kids playing San Andreas, nor is there any casuality to show that even if there were a massive epidemic that it would seriously be a problem.
So in recap, this is legislation designed to stop something which isn't happening in an attempt to prevent something that probably wouldn't happen anyway.
I'm perfectly willing to believe that video games aren't the best thing in a kid's life. I'm willing to believe that for some kids, they're probably downright detrimental. But they aren't a health risk. Parents who ignore their kids are a health risk.