The following statement was released 2012-08-13, promising finally to implement an open standard M$ foisted on the world but did not follow since 2007, five years ago. Deliberately choosing to break an open standard is reprehensible and possibly illegal restraint of trade. The means M$ used to impose that open standards was also questionable. Why bother with a company that offers future standardization when you can have it now with LibreOffice?
M$ does not lead in giving customers choice and flexibility. It lags for years. OpenOffice.org supported ISO 29500 since 2008 and ODF before that.
“Microsoft continues to lead in giving customers choice and flexibility in file format standards and interoperability. With these enhancements, Microsoft Office now provides full read and write support for the most commonly used document format standards, including ISO/IEC 29500 (Strict Open XML and Transitional Open XML), ISO 32000 (PDF), and OASIS ODF 1.2. So no matter which of these formats your documents are in today, you will be able to work with them in the next release of Office. And you will be able to save your Office documents in any of these formats, providing the broadest options for document format interoperability.”