
Let me make two things clear: first, I will not give away any spoilers related to Duplicity (trailer) and second, it was the most entertaining Hollywood production I have seen in quite a while. There have been a number of big-name movies that I've liked quite a bit, but not one that really puts together all the pieces together to be so entertaining in a way that just shows off what can be achieved with all the tools available. I'm going to risk sounding like a fan boy but the only two regrets I have about the film is the dialogue in one of the final scenes and the fact that the movie will not hold up as well to multiple viewings because I already know what will happen. Otherwise it was just a lot of fun from beginning to the end credits.
I've already alluded to Clive Owen, who really shines in this movie. He is a perfect fit and embodies the swagger, style, and wit of the character in a way that I am skeptical another person could. He is James Bond with all his debonair charisma and "swinging big dick" attitude (a line from Duplicity) unleashed in a corporate setting and with added emotion instead of the brooding anger of the most recent incarnation. He outshines Julia Roberts, which is no easy task as she was at least once known as America's sweetheart. I'm not much of a Julie Roberts fan except to say that she does quite well at creating characters that are charming and likable. Although she is not quite up to Owen's level, the real accomplishment for her here is how well she plays a cold, calculating spy that uses the Julia Roberts charm a a tool -- a fine turn for the actress and an subtle meta reference much better played than the dismal joke in Ocean's 12. Smaller movies frequently have a star who puts in a great performance but a larger movie like this brings both of these actors as well as an entire cast that all contribute -- with special recognition due to Paul Giamatti among many others.
Is great as the actors are, however, it's the overall package that really makes this movie. Tony Gilroy -- who coincidentally enough wrote for the screen the obvious influence on the new Bond -- really nailed it. It probably is the case of this being a movie that happens to be right up my alley (I admit others might not like it as well as me -- It's my kind of movie), but the way he makes the viewer reconsider earlier scenes as more is revealed and weaves together a plotline that goes back and forth in time is matched by editing nearly as suave as Clive Owen in his two-button suits. There was an article in The New Yorker a few weeks ago that is worth reading about Gilroy's filmmaking and focusing on his use of the "reveal," which he describes as anything that's a surprise. This movie is full of them and honestly keeps you interested because you just want to know what they are going to do next both in the plot and in the character development. He tells the author of that article that his first movie as a director, Michael Clayton, could have been a book but Duplicity could only be a movie and that point is where I think the movie shines. It uses all the elements of film -- acting, editing, directing, and screenwriting just to name a few -- to advance the story not just because they are elements of a movie but because they are tools. And the screenwriting! This movie was hilarious and not in a jokey kind of way, which I can appreciate at times but am even more impressed when a movie can be funny without trying so hard. It is funny in the sense of having wit and in putting characters in situations where it is inherently comedic without feeling like the actors are trying to do something just to make me laugh. On top of all of that great filmmaking, Gilroy is also able to infuse more significant issues into his film in a way that is subtle and works as a reveal both in social commentary and in playing with audience expectations (a topic we have discussed a bit here). When a movie does the anti-Crash and subtly puts out ideas for the audience to consider without even telling them the topic has been raised -- in this movie (and this gives nothing away) gender roles when the man is the emotional one and the exalted position of corporations in American are just a couple. Screenwriters and directors who use subtly are a rare breed in Hollywood and in doing so Gilroy is able to combine some of the best elements of grand studio filmmaking and personal, independent projects.

And my point on that subject is that it's impossible for documentarians to do that for the same reasons that it's impossible for other filmmakers. I also think that creating a dichotomy of documentaries on the one hand and history-based fictional films on the other doesn't make much sense, since they're both making the claim, either explicitly or implicitly, that they're depicting the facts. Frankly, I don't see much difference between documentaries and fiction other than the fact that documentaries have non-actors and usually have narration. They're still trying to convey a vision or message, and will pick and choose what they show and how they show it based on that vision or message; any difference that exists is one only of degree, not of kind. That goes both for sensationalist stuff like Michael Moore's docs and for more meditative, less beat-you-over-the-head docs like Herzog's. So I really don't see why some films have this responsibility because they call themselves "documentaries," while others don't because they're "history-based fictional films," when they all face the exact same dilemmas.
I do understand your point. As one final volley i offer the following: genre selection is an important part in the filmmaking process. Choosing the lens that you want to view the material through and then executing it determines to a large extent how your film will be received. To combine the genres, which you argue is an acceptable outcome, is to say that there is not much difference between comedy and drama except that one is funny. The entire expectation changes based on the genre that you choose -- which gets back to my original point of different expectations for documentaries than for historical or biographical films...
I know you may say that dramas and comedies are too dissimilar and do not fit the point you were making concerning documentaries and historical films. I simply disagree.