Actually, come to think of it, my housemate and I closed down the literary agency arm of our business about the time Amazon's bookstore came into being - that would have been around, what, 2008? 2009?
People really had no use for us anymore if they could just bypass the middlemen of agents, editors, and publishers, and just do it all online. I'm honestly surprised literary agents still are needed. I suppose if you were old-school and were a sensation before the rush of the internet, you might want one for legal matters but...what's the point?
Like I said, you can be a sensation if you have a good quality book (or bad quality book), and just advertise it like mad. One of our former clients had an exceptional and successful mystery book. He dropped us and published the sequel on his own. He spent thousands of dollars on marketing it, bought a Kirkus Review and bam, a best-seller. *^^*
So, if you really want to be mainstream star with adoring fans and gobs of money, yes, get an agent. But if you really just want to show your work to the world without the fanfare, just head to Amazon.
Print is dying anyway. *^^*