most of the anime today are water down single cel...
I would have to disagree. Certainly they aren't putting in the effort of the studios from the 80's, but modern anime isn't that cheap. Most series are getting cut back to 13 episodes so the studios can focus more on adding some smooth and fairly well drawn animation. If it were five years ago, I would definitely agree with you. The late 90's into the early 00's definitely had some really offensively cheap animation (anyone wants to see the worst of it, check out a little series called Vampire Duo, I've seen more animation in multimedia comics). A lot of studios seem to be shortening their series to increase the per episode budget so they can put a heavier emphasis on animation than they have in the last few years.
They still have a long way to go to get back to where they were twenty years ago, but they are starting to get out of this rut they've been in. I really miss some of the crazy shit they pulled back in the 80's with the ultra detailed mecha designs, special effects, and dynamic camera work (where the entire background was animated by hand as the camera swept through the environment, people don't do this stuff anymore), not to mention ridiculous amounts of character animation. I'm starting to see some series which are going back to that mentality (although CG is kind of ruining some of it) at least with the character animation and even in some cases the mechanical designs and drawings.
Of course, comparing a movie to televised animation makes about as much sense as comparing Snow White and the Seven Dwarves to Rocky and Bullwinkle. They have different approaches due to differences in budget, length, and in many cases audience.
