I'm reminded of what Casey said.
starspawn said that GPT-2 might have the data scaled up by 100x to 1000x by the end of this year, and that would be really exciting to see. That's probably an understatement, actually - a coherent novel produced entirely by an AI would probably be the single biggest milestone in the field's entire history. If media synthesis was a nascent technology around 2014 and 2015, and a technology that was advanced enough to be useful in a limited amount of cases during 2017~2018, then a fully coherent novel or novella in 2019 would see the field begin to dip its toes into 'mature technology that has very broad uses' waters. It would be a fantastic coda for the 2010s to begin with AI that was no more impressive than SmarterChild - a dumb, goofy little toy that wasn't good for much more besides giving middle school and high school kids a laugh - and end with an AI-produced novel.
When we started this decade, I was an amateur fanfiction writer who assumed that robots & AI would never be able to competently write fiction. I knew this because some time in the fall of 2010, I actually searched for text generators. Just like my classic blunder of thinking we had Cartoon-a-trons in 2005, I thought that there were websites where you could theoretically input some text and get a competent story out of it. Though to be fair on my part, I didn't expect a world class novel, just something amusing. The only ones I found were basically glorified Mad Libs with that stuck your chosen words into a pre-written story. It didn't matter which verb, noun, adjective, etc. you chose; it'd always be the same story depending on the genre you chose.
From there to here.