Not really. The Lord of the Rings is about as traditional as it gets, and it was a pretty huge box-office success. Harry Potter doesn't really introduce much to the traditional Wizards and Witches tropes (except perhaps for Quidditch), and yet it's also a huge worldwide hit.
I think Hollywood, for years, has consistently tried to make the public think that non-traditional is how you can attract teens and people in their 20s (i.e. MTV). Yet, the latest American Generational Studies show that the latest teens and young adults aren't looking at MTV for role models. The people they actually respect the most are their grandparents - the World War 2 "Greatest Generation" types who are all about traditional values and simple living.
In short, traditionalism actually sells. D&D is one such product that would benefit more from emphasizing its traditions, rather than attempting to chase the lead of other RPGs who have established themselves as the "new and cutting edge" ones.