While I agree that the submitter was being a bit romantic in his depiction of the reader, you shouldn't dismiss his ideas simply because of it. One of my favorite elements of reading static text without any added illustrations is you get to use your imagination to fill in the blanks! TV basically just hands you all of the artwork and scenery but when you read, all you get is the jist from the author and it's up to you to weave those descriptions together with your imagination into something.
Adding all of these interactive elements robs children of the process of creating these images themselves. when they hear about XYZ in the story they willl just imagine the depictions that popped out of the margins in page 2 instead of their own mental image based on the description.
To me, this has always been one of the greatest strengths of literature and I would hate to see the importance of this cast aside in favor of profits/"oh look shiney shiney" mentality.