This decision was a bit of a surprise to me.
It concerns Google's practice of "selling" priority in search results to advertisers who pay to be "associated" with a TM that is not their own. This includes retailers honestly trying to promote their genuine brand name products in their stores as well as competitors trying to trade on the good will of a famous mark to draw attention to their products/servies.
For obvious reasons, TM owners object to the "use" of their trademarks by competitors for this purpose and Google is facing lawsuits around the world about the issue. The question has always been whether this "use" of the trademark should be considered unlawful on its face. For instance, comparative advertising is not unlawful per se, but difficult to do without crossing the often "hazy" legal line.
My impression had been that Europe was generally more "pro" TM owner than free enterprise, but this decision seems to break that mold.
