Well...yes and no. Read this to get a clearer picture of who is actually making what:
http://www.europastar.com/watch-knowledge/1004087450-mechanical-who-will-succeed-eta.html
From the article, Sellita's production as of last year was around 40% still assembling ETA movements they buy from ETA. By 2019 they hope to have all 1.6 million movements per year produced by them, but there is a catch...the bigger issue is balances and balance springs, and mainsprings. They are trying to put in place the ability to make these parts, but recognize that about 90% of Swiss watches rely on Nivarox for parts. COMCO has ordered Nivarox to keep supplying these parts for now. Once it's demonstrated that others are working to fill the void, I suspect they will allow Nivarox to start cutting back supplies of their parts.
The bottom line is that Sellita still relies heavily on parts from Swatch group. They can't even get their production of approx. 1.6 million movements to be fully in house yet, let alone replace the 5-6 million ETA movements that are sold every year (well before the reductions started anyway).
Same situation for Soprod, so although there are makers that are moving in the right direction to fill the supply, they won't be able to produce what Swatch is removing from the market by any means.
There will be plenty of ETA parts floating around for decades to come, so I don't believe the watches will become paperweights any more than any other watch that has discontinued movement parts would be. If the watch is desirable, then it will still get repaired as other desirable watches do now.
Cheers, Al