Without qualified immunity, us lowly civilians don't have the luxury of relying solely on what is legal.Ok... I guess we agree then. What has always been legal is still legal and it is good that they ruled that it was legal to remind us all that it is still legal.
There... I see the significance...
As they say, "it's not what you know, but what you can prove in court." This decision, IMUO, gives people who "legally" film officers in public places greater ability to prove they were in the right and the avenue to seek redress when they are wrongfully arrested.
As I said, perhaps more importantly, there should be a "chilling effect" on officers and departments who make a habit of allowing this sort of behavior amongst their ranks.