Bless his heart: David Denby of The New Yorker remains one of the few gainfully employed film critics of our age with the insight, intellectual heft, movie-history savvy and graceful writing style to produce provocative and engrossing essays such as this one on the current state of romantic comedies. Mind you, it’s the sort of lengthy piece that is best savored away from the computer monitor: You should print out the article, or maybe even buy the magazine, and page through it at your...