[PubQ] Is the gap between trad and self-pub getting worse, or will it all be something different in the future?

Someone said in a other thread that the chances of getting trad published are getting worse. With all the self-pub going on—that's largely due to the technology of the age we live in (internet)—do you think trad will get harder to do or less practical as technology evolves, or will it continue to adapt to a new age? Will this duality even continue indefinitely, or will it become something more merged over time?

For the really deep thinkers: What will publishing look like in 50 or 200 years? Will it just be something completely different then; everybody bouncing around books to each other in a telepathic web, or will we still have this self-trad duality going on?