After long years of labor on behalf of the Drupal community, Drupal 8 has been finally released!
Drupal 8 is built upon a better architecture, having Symfony as it's basis, and has tons of improvements in different areas, such as:
- Content Editing - in-place editing.
- Caching - more flixible and powerful selective caching.
- Architecture - pluggable OOP-friendly architecture.
- Theming - more powerful and themer-friendly theme layer based on Twig templating engine.