Fantastic Sci Fi
of course this film is dated and doesn't live up to modern things, but many of the bizarre concepts are still more interesting and entertaining than much of modern sci-fi.
I like how it gives no craps about origins of tech and gear, and just says, "This is stuff. is what it is. deal, and don't bother questioning it". It's just good, weird, interesting, entertaining sci-fi at its best: plight of people, strange technology (mostly unexplainable, that is what good sci-fi should be about!), decent animations and tone... I always enjoy watching this film.
And it doesn't feel like it is "Art House" to me anyway. There is enough of a progression to a story, that it isn't pointless, directionless "art" waste.