Interesting perspective. Point well taken on the long-tail with digital publishing. The biggest hurdle for digital publishing outside of the main storefronts for individuals will be marketing.

Companies that put out digital publications have an advantage as their audience is likely already coming to their website for content and downloading an e-book from their e-commerce site will likely not be much of a stretch.

But the individual trying to publish is also going to have to market their wares. So again, trade-off.