This article has some interesting info, however, I'm not sure I'd draw the same conclusion.
Sony now knows how bad the reaction is, but, that doesnt mean they wont do the same. Think about it - if they did, then both consoles are even in that regard. There will be heavy pressure from publishers to restrict or profit from used games, and MS and Sony might end up taking a cut in exchange for their participation in the program. So, the consoles would end up being equal in DRM, people will buy them because they are sheep, and the publishers are happy. Maybe Sony could have DRM but relax the always online requirement to curry some favour with consumers.
The other option is of course to go anti DRM. Doing so could cause problems with publishers, and could lead publishers putting all of their weight behind the Xbox in order to make it the more attractive platform. Think about it - as a publisher, you want more money. To get more money, you want control over used game sales. If they just make sure that more games are released for Xbox than PS4, gamers will gravitate towards the Xbox just because of a greater selection of games.
However, it could go the other way. An anti DRM stance may make the PS4 so much more attractive to consumers, that the Xbox simply gets outsold. If it happens badly enough, Sony can then dictate terms to publishers.