I've been reading a book by fantasy author Terry Brooks called 'Sometimes the Magic Works'. He relates a series of useful hints for authors based on his own experiences, which include writing the tie-in book of the film for 'Hook', and later 'The Phantom Menace'. His experience was that the writing of a book is absolutely nothing like the process of making a movie, and that his expectations as a writer were hopelessly wrong when applied to movie-making. Yet fundamentally, they are both forms of passive, linear, closed-ended entertainment, quite similar when looked at from the outside.
So if those forms can be so different, how can anybody expect to equate movies to games - which are active, and often non-linear and open-ended - and expect to be taken seriously?