^I said "all genres," didn't I? Yeah, sci-fi, as long as it's mostly a tear-jerker movie and not an action flick or comedy/fantasy with one tiny sad scene. UP, for instance, has both comedy and drama, as it continues to reference the old man dealing with his wife's death. But Wall-E? Probably not. It really only has one sad part which is quickly solved. Silent Running, The Time Traveller's Wife, etc---those would work, and they're sci fi.