Drupal 8 is better than Drupal 7. Data-modelling, performance, multi-language. It feels so much more robust this day. More functionality is in-core and fully tested. In a conceptual way, Drupal 8 is not so different from Drupal 7. The Administration-UI’s are the same and you probably will also use the same modules for a project. Site builders will feel really comfortable. All-in-all I am getting excited about Drupal 8!