I wrote about embedding of fonts in this blogpost: http://lodahl.blogspot.dk/2013/06/libreoffice-41-most-important-new.html
The embedded fonts will most likely result in better interoperability with Microsoft Office and between different OS'. But there is even more coming on that shelf: Even better interoperability.
From the release notes: https://wiki.documentfoundation.org/ReleaseNotes/4.1
- Import and export of graphical bullets of numberings in the DOC, DOCX and RTF filters.
- Numerous improvements have been made to the Microsoft OOXML Import and Export filters as well as for the Microsoft Office binary file formats and the RTF format.
These new features (or fixes) is absolutely on my list of favorites in this upcoming version.