The fantastical is thoroughly woven through English literature, in all eras, and Shakespeare has some of the best stuff.
Ironically enough, Shakespeare is a significant inspiration for my own City of Masks, which is a fantasy completely without any magical elements at all.
What this article fails to mention is that indies have been publishing series books in quick succession for some time. I know Lindsay Buroker is currently experimenting with the effects of bringing out a trilogy within (I think) a few weeks.
Another, even more comprehensive, report from Hugh Howey and Data Guy.
The good news: there are thousands of authors earning a living wage from writing, some of whom seldom or never appear on the bestseller lists. The bad news: this still represents a relatively small percentage of authors. But it appears that the advent of ebooks has grown the total market and made it possible for more people to make a living out of writing.
The other news: There are still reasons to pursue traditional publishing (either with the Big 5 or a small press), but, except for a very small number of authors, earning more money is no longer one of those reasons. This becomes clearer with every report they release.
Urban fantasy fans, watch out for this one, coming next month. It follows the classic UF structure, but takes it to a more thoughtful place by making relationships and family, in many different permutations, key throughout the book.