Almost every bill against videogames gets shot down even with a respectable amount of support. There was this law in California (if I remember right) that would have prohibited M rated games to be displayed in front of minors - which is even MORE moronic than this - and despite support from several key groups it never passed. I don’t see how this should be any different unless it gets a LOT of support.
Also, did anyone besides me immediately start thinking that if this law was in effect nationwide when EverQuest came out, SOE would be up to its neck in lawsuits? 
The stores are also the problem. I remember reading one article where a guy, as part of a study, had his obviously-ten-year-old son buy an M-rated game (apparently unattended), and the cashier said, “Oh, yeah, that’s a sweet game!” as he paid for it.