As a monopoly, Microsoft correctly views interoperability as a threat. Interoperability means viable software choices for computer users and a level playing field for software developers. The Samba team will surely be smiling from ear-to-ear over this ruling. Samba helps make the transition of computer networks to free software easier by providing a layer of interoperability.
As for the 497 million euro fine, we’d gladly trade that in for a similar ruling on Microsoft’s OOXML shenanigans.