How long until novels are published with video inserts?

In Charlie Kauffman’s Bafta lecture (a startlingly honest reflection on film writing, and well worth a listen), the screenwriter, producer and director stresses that it is of the utmost importance, when embarking on a screenplay, to write something that could only be portrayed in the form of a film, and in no other medium.

He is, of course, right: for writing a screenplay, in a purely technical sense, is different and distinct from writing in its other forms. You rarely have authorial narrative and do not overly embellish with descriptions. Rather, you must distil the essence of the piece into dialogue and action. You must then describe the visual world of those imagined scenes; transmitting them onto paper so that they can be filmed and replayed in the same form to countless audiences, who will all see the same thing but interpret them in varying ways.