An inconvenient truth:

Another thing to consider is whether ad effectiveness will factor into what photographers charge for ads appearing in media tablet publications. Publishers and third parties will undoubtedly be analyzing the impact of ads that appear in tablet editions, especially those premium ads that include multimedia and interactivity. If research shows that ads are more effective—leading to click-throughs or making a bigger impression on readers—when viewed in tablet editions, publishers will want to charge advertisers more for those ads. Photographers would presumably also want to receive more from clients for licenses to images being used to create the more valuable ads.

Writers, actors, photographers — Artists — are content providers, publishers are the distributors and in-between are agents & managers. What we sometimes forget are how publishers and companies are taking things for granted; content is the heart of the matter, how the content is being utilitized to generate profits should be properly and fairly retributed to the entire food-chain.