Not every movie is processed & post-edited to make it look good for average joe football, but rather towards the stylistic choices made during the shooting of the film itself.
I think grain is acceptable but not very appealing in HD. (300) No matter how ugly the director's intentional look, there can be no argument that color & detail pop in HD. Its when fine object detail becomes masked by noise or compression that bothers me. Also rarely would a cam be used to shoot an entire length of film (Sahara comes close) with 1 zoom lens. Depending on the master & age, some films are not cleaned up & speckles of dirt highlight your HDTV or projector. (Fifth Element) The best HD-like average joe football comes from computer animation, nature docs, & music concerts where lighting is pimped full of contrast which HD handles real well.
What isn't acceptable imo, is massive layers of edge enhancement. Not much benefit at all in HD if it is excessive like 40-year-virgin or Tremors. Smearing of fine object detail is due to DNR & can also mess with color. Imo, its not tooo distracting & actually in some cases it gives the illusion of great HD.