I don’t think I’ll ever see the Visual Novel medium in it’s current incarnation as truly being a segment of the greater “game” genre of interactive mediums. This opinion, however, it not meant to detract from the Visual Novel style in the slightest.
From my own humble perspective I see VN’s as the culmination of a few separate movements in storytelling and interactive media. When I first stumbled upon a handful of visual novels that caught my interest I was immediately taken back to the days of MSDOS and text-based adventure games. So sure, some VN’s do occasionally have limited “gaming” mechanics within them, but the other medium that I find parallel to VN’s would be the CYOA Books of the '80’s and '90’s.
This is truly where I feel a classification of VN’s should come. If anything, most VN’s are either kinectic (in which case they are simply digital graphic novels not unlike reading a graphic novel ebook), or could be considered CYOA Graphic Novels in digital format.
Again, this is not meant to say that VN’s are lesser than games, or less deserving as a means of storytelling. I’m just as much a fan of an inspired story as I am an enveloping gaming experience. Sometimes they walk hand-in-hand. Other times they are apart. It doesn’t mean one is better or worse than another, but I do take contention with one thing to arise from the movement of the VN currently; due to the insistence of the community, or the authors, or both (I’m really unsure) of them being classified as games, it becomes frustrating to stumble upon them when I’m instead looking for a interactive gaming experience. Many times I have recently found myself checking tags or comments to be sure what looks interesting is a “video game” rather than a visual novel because of this forced ambiguity, and quite frankly, it’s frustrating. It literally puts me off of a visual novel if I’m mistaken due its somewhat mislabeled experience, and I know I’m not alone in this feeling.
Thus, for the sake of visual novels flourishing as they properly should, I would think a unique and individual classification would only help them grow. People who enjoy them will search them out no matter the title, but “gamers” who feel duped into downloading/purchasing them because of vague and misleading marketing will only come away with a negative bias.