Today I assisted a Webminar from CommerceGuys. Drupal 8 will introduce a new architecture that eventually will render current modules obsolete. The initiative seems strong, moving along, has technical reasons behind it, etc... I was relieft to learn current module system will coexist for some time, their plan seems to be a gradual change.
You can see the recorded webminar at http://commerceguys.com/webinars/drupal-8-plug-it-and-go