Before you put out new systems or new supplements you need to find more gamers. A new role-playing game won't do this.
It is a marketing thing, sure. People need to go out and motivate others to try the game. There need to be commercials that show that gaming is a positive life-style choice and it's "cool" (maybe in an "uncool" or "nerdy" way
) to be a gamer. Gaming should be presented as a viable hobby. Gamers must be described in a positive light - they might be nerds, but they are smart, they are self-aware of their nerdity, and they have a lot of fun in their life.
All those negative gamer stereoptyes- fat, smelly, shy, they must be proven wrong by examples, by commercials, by media coverage, by portrayal in movies.
If that means you have to lie, so be it.
Of course, gamers also have to stop seeing themselves as "elitist" and there are "real gamers" and those that just come because its cool. Because at the end, the only thing that counts is the fun you have at your game table.
Of course, I have no idea how to make this work. I just know that creating a new system is hard, important, and totally not what will create more gamers.