Hmm. I'm not a lawyer, but it seems this one was a no-brainer and doesn't really mean anything to the rest of the industry. The guitars in question were clearly not counterfeits as they were deliberately branded differently. They weren't trying to fool anyone.
In a perfect world, the ones who should worry are the Chinese manufacturers who actually make counterfeit instruments intended to fool consumers into believing they're getting the real thing, with everything down to the branding duplicated. Sort of. Anyone who knows guitars can spot a "Chibson" pretty fast, but Joe Sixpack isn't always as astute about such details, and contrary to many trademark holder's understanding, this is why trademark exists in the first place - to protect the consumer. But, as far as I know, there's not a whole lot anyone can do to/about Chinese manufacturers directly beyond banning import of their products. Of course, this is usually about as effective as training cats.
The more interesting suit is still upcoming, which deals with Gibson's design trademarks. That's what Gibson's been using to threaten manufacturers of "clones". They say the shapes are theirs. Everybody else says no, they're as common as herpes, nobody owns them. Everybody and their brother has been making them for years and nobody kicked, so STFU and go away.
This is the downside of trademark. Once it has been awarded, you have legal recourse to prevent anybody from using your "marque", but it has to be defended or exclusivity is lost. In other words, if you don't complain, consent is implied, so trademark no longer exists. Gibson has only recently (within the last couple years) started bitching about a practice that has been in place for many years among a number of manufacturers, so now it's gonna be up to a judge to either tell Gibson that if you snooze, you lose, or uphold their claim.
It's tough to say which way it will go. Logic says Gibson's gonna lose, but common sense isn't as prominent a feature of such decisions as one might imagine.