More in core
For the casual user and beginner to Drupal, Drupal 8 will be far easier to get to grips with due to the functionality and modules moved into core, including several field types and the Views query builder. With Drupal 8 it is now possible to create a tidy fully-featured no-frills Drupal website with core alone.
The Content Type manager has been enhanced to make it far simpler, cleaner and more usable.
For advanced developers this will shave precious minutes and hours off configuration times and anything that encourages new users to explore Drupal has got to be a big plus.
Drupal 8 brings powerful responsive features into core. Image styles can now be set per breakpoint and per image enabling a massive boost to performance when used well.
The admin system has had a makeover to make it more touch and mobile friendly so we will be evaluating just how usable content management performs on smaller devices - if it proves to be very effective this could make mobile content editing available to the end user, something most of us would have steered away from with Drupal 7.
Perhaps the biggest structural change to Drupal 8 is its ability to effectively uncouple the front end (what a website visitor sees) from the back end (where the content, data and configuration happens).
We are looking forward to exploring this feature - and the steep learning curve and R&D that it will surely require - but what it will do is allow even more flexibility, control and power for developers to create whatever the use-case demands.
Drupal 8 is Multilingual out-of-the-box
Whilst Drupal 7 has a built-in translation system and the ability to be configured for multilingual content, creating internationalised or multilingual sites was long-winded.
Now Drupal 8 has content translation in core (or rather a place for your translated content - don't get too excited!) and we're looking forward to seeing how well it performs on internationalisation best practices for clients with global markets.