"The Post" has all the earmarks of a VERY IMPORTANT MOVIE. It stars the queen and king of importance, Meryl Streep and Tom Hanks, who between them don't have enough fingers and toes to tally their Oscar nominations. Though a period piece, it deals with a vital issue - the government versus the press - that rings with resonance today as the media battle both a hostile executive branch and the grinding gears of shifting reader and viewer habits. It's based on a true story that created a crisis for the Nixon administration. And, if all that's not enough, it's helmed by Steven Spielberg, one of the few directors alive whose name implies "cinematic importance.