So yeah, I am interested in the idea that D&D could "grow up" out of its (adolescent) ghetto, both in terms of social acceptance and artistic legitimacy.
I'm interested in the question of D&D's artistic legitimacy too, and I'll try to answer it here and now...
...D&D is not an art form, legitimate or otherwise, nor is anything gained by attempting to frame discussions of D&D as if it were. D&D, considered as a
form, offers no special tools for investigating human experience, unless, of the course, the experience in question is the disposing of a troll corpse with fire oil. Then again, most games aren't suited for the task of the illuminating the human condition in and of themselves. Not even chess.
Taken as a whole, D&D better considered as a platform for delivering problem-solving/tactical challenges, not as a particular set of tools for artistic inquiry.
Which isn't to say D&D isn't a creative outlet (it is), nor is it to say that D&D can't be art. Sure it can be, in isolated cases (heck, I think a pile of Brillo boxes can be art, so why not a few D&D campaigns?). Of course, the same can be said about SF novels, literary novels, paintings, poems, and once in a blue moon, dance. The sad fact is most art forms aren't art, outside of isolated cases...
What's gained by attempting to brand D&D, or RPG's in general, as an art form? Is it a prestige thing?