Drupal templates starting from #32668 are compatible with Drupal 7
Drupal 7 features:
- Vastly improved administrative user interface thanks to the D7UX movement
- Flexible content and custom fields
- Better visual presentation and theming with Render API
- Accessibility is greatly improved
- Image support is now included
- Automated code testing
- Improved database support
- Better distribution support
- Support for the Semantic Web through RDFa markup
- Over 850 Drupal 7 contributed modules have met their #d7cx pledges.
You can learn more checking the Drupal 7 release announcement