Destructoid has an article up. It attempts to discuss whether or not Heavy Rain is "doing videogames a disservice." Attempts because the author, Jim Sterling, is clearly arguing that it does. Jim adding a question mark to the end of a headline he's already answered is his first mistake.
...videogames are a legitimate work of creative entertainment. But for them to deserve that label, these types of games must exist. It being comparable to film does not change the fact that within the gaming industry, it is unique.
...Heavy Rain, while comparable to film, and perhaps even driven to be as film like as possible, is at its heart a game. You, the gamer, control the characters. You drive the story forward and affect the outcome with your in game actions.