A new version of the standard, ISO 9001:2015, has just been launched, replacing the previous version (ISO 9001:2008).
The most noticeable change to the standard is its new structure. ISO 9001:2015 now follows the same overall structure as other ISO management system standards (known as the High-Level Structure), making it easier for anyone using multiple management systems. More information can be found in Annex SL of ISO/IEC Directives Part 1 (the rules for developing ISO standards).
Another major difference is the focus on risk-based thinking. While this has always been part of the standard, the new version gives it increased prominence.
The company has a three-year transition period from the date of publication (September 2015) to move to the 2015 version. This means that, after the end of September 2018, a certificate to ISO 9001:2008 will no longer be valid.