Back after a hard and way too long day work !
Okay, I get your point about [c]RPGs.
Obviously, I'm annoyed by the definition pointed by Madscientist, as I see resolving everything with dices a strong obstacle to actually playing a role, which is why I much prefer a story-driven game of Vampire / Cthulu, where you actually have to play a role rather than let dices do the job. Or well, you can try attacking a werewolf with a Malkav bookworm, but you don't need the dice to know this is gonna end badly for you

Let's just say there are "role-playing" games and cRPG. Yes, I know RPG means just that. As Lacrymas said, it's a stupid and confusing name in the first place.
As for art, it's somehow like History. There is the saying that goes, "History is written by the victor".
Art is kinda the same, except art is written by rich and powerful sponsors. Art is deeply subjective : it depends on exposure, the era, relationships, and (fortunately), talent. It's not a coincidence art form like Impressionism was shuned upon for a long time before finally rising to fame. Were you the favorite of a king or a prot馮 of an influent noble family, chances are your name will stay.
In the long run, what will stay for the centuries to come is what people decided was worth it, either by taste or by money. The subjectivity of today can be the objectivity of tomorrow. What was universally seen as horrible yesterday may have become the masterpiece of today. Art evolves, tastes too, but there are, ultimately, no defined rule to what will stick, what will go.
It's a good thing people are voicing what they expect from the Hall of Echoes, now that we will have it. I hope we will know more about it and what the plans are sometimes during the dev process, and I actually asked a question on this at the reddit AMA ( waiting for a potential answer :p ).