i know, first hand, how many companies just ignore the requirements of open source licences. often because they feel there is no 'power' behind enforcing our licences. so anything that helps them realize that they can't just make things better for themselves without contributing back the code.
this is an excellent case for all of us writing floss software.
The decision shows that companies may be held liable for GPL violations in any country, even if the GPL isn't upheld in their home country.