The article is right. Grain is part of the image and should not be removed, otherwise it looks like video, and film is not video. The film stocks of today are so perfect that you can get a relatively grainless image so some modern films look pretty clean and slick, thus there is the aesthetic counter-reaction in films like Minority Report where its intentionally grainy. However, its also important to keep in mind that a lot of grain is foreign, that is its not on the negative but the result of duplication and processing, and thats the grain thats the enemy. I guess one could argue that it takes a trained eye to know the difference but to me dupe grain has always stood out as looking much different than grain on the negative; I would like to think that most people can tell that grain is stylistically used in Minority Report on purpose, and that there should be some texture to film--people that argue against this are often people that don't like widescreen "because of the bars". Video noise isn't really that common anymore because our technology is so good now, its usually dupe grain that people occassionally get fooled by.