With all respect to Mr. Nicholson, I have to disagree.
If NY trad publishers were to transform themselves into a few geeks sitting in front of computer screens hawking backlist titles as ebooks, then they'd no longer be NY trad publishers. They would be just marketing geeks, backed by a lot of cash to publicize a giant number of ebooks.
But they'd still have this problem, which each of US does not:
They'd be hawking a zillion titles.
We're only hawking our own.
WE can focus our resources, hone our marketing pitches, define and target our audiences -- individually, thoughtfully, meticulously. We can also adjust our efforts on the fly whenever something isn't working right. We can try out new covers, new blurbs, new price points.
But the NY version of the Geek Squad would have no such luxuries. They'd still be forced to promote a host of titles from a horde of authors, each targeting diverse readerships. So, realistically, how much time, and what percentage of resources, could they devote to any given author or title? Almost zip...unless your name is Patterson or Evanovich or King. In other words: same as they do NOW.
Moreover, big corporations are bureaucracies, where each participant clings desperately to his title, office, salary, and perks. How does any massive, disruptive transition to a lean, mean, marketing machine actually transpire, when everyone now working in the Big 6 will be fighting the changes every step of the way?
So, my answer to this bogeyman threat is: Bring it on.
I'm betting that they can't pull it off. What they'll do is use the indie bestseller lists as their new "slush pile" (as Robin Sullivan has pointed out), and then try to seduce successful indie authors into their fold with much better deals than they now offer. And for many authors, there's nothing wrong with accepting a good deal from a trad publisher.
But demolish the indie market? Fat chance. I'd be happy to wager about that, if I can find any suckers willing to take the bet.