Prognostications!
I don't think B&N crumbles this year. But the trajectory is not good . . . and I don't think it's because of the brand or bookselling in general. Horrible, horrible management. It really seems that the upper management is far more concerned with draining B&N dry than running a bookseller. Despite the unstable financial footing it's still a dividend stock, and there are a host of executives taking massive salaries while steering the ship into the rocks. I'm reminded of the news from a year or so ago when B&N fired many of their long-term employees to save a few million dollars, while still handing out dividends and multi-million dollar executive salaries.
https://teleread.org/2018/02/14/barnes-noble-lays-off-hundreds-of-experienced-employees-may-not-be-long-for-this-world/ It's really being run for the benefit of the large shareholders and the executives - disgusting, predatory capitalism at its worst. 'Merica.
But I think the business is still viable, and the brand is strong. I predict that after the blood is drained from the corpse the parasites in the boardroom will strap on their golden parachutes and float off into the sunset, and then a buyer will emerge that will revitalize the stores. There's too much potential for it to stay dead.
On the issue of trad authors going indie . . . it won't be the Kings or the Rowlings or the Roberts. They have more than enough money, and they love the fame that comes with being feted in trad publishing. What I predict is that more and more strong mid-list authors will go indie . . . the authors that release a hardcover book every year or two, get a decent advance and critical acclaim, but still have to hold down another job to pay the rent. It's a surprising number of authors - household names, award-winning name in houses that love particular genres, who are being exploited by trad publishing. NK Jemisin - who has won multiple Hugos and is one of the biggest names in Fantasy - could only go full-time as a writer through Patreon donations. Kameron Hurley - another writers with 10+ books to her name - several quite successful - wrote a blog post about her income from trad. Despite so many successful books her income (advances and royalties from her writing) was only 16,000 last year.
https://www.kameronhurley.com/writing-income-made-2017/Now, a lot of these trad writers would prefer the social respectability that comes with trad over the money and freedom of indie. But I think a lot of them don't actually realize the potential - they almost intentionally ignore the news of indies making living wages because it sends cracks through the foundation of their world view. But some will start to make the jump, and then others will follow. And this will increase competition.
Successful indie writers will continue to get poached by trad publishers. This past year a bunch of the top indie fantasy authors have signed deals with major publishers - Kel Kade, Duncan Hamilton, Brian Anderson - the difference is that these deals aren't for past works (like when Blood Song and The Riyria Revelations or the Shadow of What Was Lost was re-published) but rather new works. (Though we did see several indies books republished - Senlin Ascends and Gray Bastards, though they weren't huge sellers before so the rights might have been reasonable) Trad Publishers - smartly - are realizing that getting attention in this new publishing landscape is extremely hard, so it might be more practical to partner with indie authors with significant followings than trying to develop debuts from obscurity. I was even contacted by a senior editor at Tor asking to see my next series. The indie ways of getting attention - AMS and Facebook Ads / Groups and KU and email lists built through various means - are proving more successful than the old trad ways (bookstore placement, reviews like Kirkus, etc)
I think the top tier of indie books will keep getting more professional. The covers, the lettering, the editing, and the writing. The era of mediocre work succeeding based solely on price is fading, and as KU and other indie readers find more high-quality books they will turn away from the stuff that's just okay. The low-price books will still exist, as in volume they can clearly still be very profitable, but the quality of what moves will keep increasing.