I worry about Amazon because they're the #1 retailer of books in the world. They're so powerful they can push around traditional publishers on issues of price and those publishers are huge companies backed by other huge companies. Anyone with a reasonable working knowledge of antitrust laws couldn't argue that they aren't abusing their market share in monopolistic ways. This self publishing trend is nice but it produces abject shit for the most part. Publishers take incredible risks on books that go nowhere. Go to Goodwill or the remainder pile in Barnes and Noble to see how much money is spent on books no one reads. Traditional publishing wants to sell your book more than the record companies want to sign your band, your book just sucks. No one, not even publishers, get into the book business to get rich but Amazon by virtue of its market share can make publishing much worse if it ends up assuming end to end control of publishing which seems to be within their goals as a company.