Today I saw Dries wrote a aiticle on his blog, "Multilingual support in Drupal 8", talked about it will has a better improvement in the multilingual system in Drupal 8. This is a great news from him and the community! Honestly speaking, the localization tools and modules in Drupal 7 have not so much differences with Drupal 6. It has a lot of improvement potential to be a more easy-to-use and friendly-to-configuration framwork of multi-language.
I believe that there will be a huge revolution in the core of Drupal 8!