[Mug Funky]

a lot of editors and directors want a "filmic" look (i don't like that word, but there aren't any others to use), so they deinterlace.

my personal opinion is if you want it to look like film, shoot it to look like film, or just cough up the dough and actually shoot film. a "film look" is not at all a post decision - it must be considered from before shooting starts. the video look comes from more than just the interlace.

as far as deinterlacing everything in the encoding world, it's probably because the majority of codecs don't support it, and a large amount of the delivery methods out there don't support it (you can't bob in youtube or flash).

i think video can look quite good and don't see the point in making something juddery and blurry/jumpy in the name of some impossible (in most video situations) film look.