Here are a selection of useful resources for learning more about Drupal 8. I've found them useful.
Good Features presentation from Drupalcon LA 2015 by Mike Potter of Phase 2
https://events.drupal.org/losangeles2015/sessions/features-drupal-8
Matt Cheney video on Configuration Management CMI - Drupalcon Los Angeles 2015
https://www.youtube.com/watch?v=Pl7-978oKNw