For a movement that got it's start by famously inventing the most cost-effective and therefore funny-looking animation techniques (remember all of those slow pans where nothing was actually moving?) anime sure has come a long, long way in the animation department. It's pretty amazing when you look at it back to back.
Of course, everything shown above were series, operating on a limited budget and expected to play over a long period of time. OVAs and later full-fledged films would obviously look a lot nicer than any series. Heck, even their openings were a lot better than the animation of the show itself.
Nowadays we have studios like Production IG, Bones, GAINAX, and others who not only maintain high production values but, in the case of IG, go well out of their way to further the practice of animation in more ways than one. Production IG is rumored to be more of an animation lab than anything else, as evidenced in the amazing visuals they created using technology they'd come up with that had never been done before in the film "Blood: The Last Vampire". Studio Bones and GAINAX are ramping up the framerates in their work, producing absolutely astounding action scenes with many, many objects onscreen all moving at the same time (think "Eureka Seven" when they were dodging homing lasers or clusters of missiles or "Tengen Toppa Gurran Laggann" almost all the time). Kyoto Animation produces some of the most consistently smooth animation in Japan at the moment, as shown in the "Haruhi" clip above, and they're only getting better.
It's all pretty astounding when you sit and think about it.