Inexplicably absent from the Oscar conversation so far this season is a quiet little film about aging, relationships and that most brutal of human emotions, the fear of dying alone. Perhaps it's a matter of marketing: in a decision that can only be described as odd, Sony Pictures decided to promote 'Jack and Jill,' a movie that offers no laughs, as a comedy. Could it be by design? Could it be that Sony doesn't want you to be aware of the emotional horrors that await audiences who do indeed decide to watch 'Jack and Jill'? Because 'Jack and Jill' is one of the saddest, most gut-wrenchingly depressing products of the human imagination ever seen on screen. It may also be the most important movie ever made.