Overview of the Rules 8.x features
Porting Rules to Drupal 8 will require a major refactoring of the framework. The Rules Core APIs & functionality will evolve and Drupal 8 rewrite opportunities will be taken into account.
Site building based on Drupal 8 core integration wins
Admin UI usability improvements
Simple Views Bulk operations in core
Reusable components
Plug-in based architecture & fully object-oriented code
Rules data selector for tokens, contexts and other use cases
Typed data widgets & formatters
Embeddable Rules UI components to integrate actions & conditions
Evolved developer experience
Unified DX based on Drupal 8 plug-in system
Symphony 2 event system integration
Deployable config via CMI
Elena Miles