The whole of Kite is about the pushing of boundaries in salacious ways, meaning at this point in time it's mostly of interest to two kinds of people: those curious about the history of transgressive topics in anime, and those looking for a cheap thrill. Take away the infamy - the extreme violence, the graphic (and questionable) sexuality - and there isn't much left. Kite is one of a handful of anime that are famous for being infamous, and that's about all there is to it.
Or, while a given title may have prominence (as described with words like 'important', 'seminal'), it isn't always a positive sort of prominence - no, not even when it means a live-action remake the material is in the offing. The same caveat applies to the use of the word classic, because one person's classic anime may just be old to someone else. Neon Genesis Evangelion's influence has been as much baneful as positive, spawning (if not wittingly) dozens of imitations and half-clones, and narrowing the field of possibility for anime as much as it widened it. It's easy to presume that when we call something influential, that the influence in question is always positive, when this is far from true.