This is big news around Southern CA, since all of our local NFs require the Adventure Pass. Locally (for me), the Los Padres NF has said that they will continue to require the Adventure Pass while they study the implications of the ruling and explore options for (further) appeals.
Originally, an Adventure Pass was required to park anywhere in the forest. In the last few years, the FS relaxed the requirements somewhat and only required the Adventure Pass for users in certain, primarily high-use, areas where physical infrastructure improvements were present (bathrooms, parking lots, etc.).
As far as the concessionaires go, we've seen a mixed bag in terms of how they operate in relation to the Adventure Passes. In Santa Barbara, along the Santa Ynez River, a concessionaire has set up a "checkpoint." You can't drive beyond the checkpoint and use any of the facilities without purchasing an Adventure Pass. In Big Sur (still Los Padres NF), the concessionaires that operate the day use areas do not recognize the Adventure Pass or other Federal Lands passes. If you want to use the day use area, you have to buy one of the concessionaire's own passes. To be honest, this upsests me more than paying for an Adventure Pass.
Anyway, I'll be happy to see the Pass go. I do worry however about what the incremental loss in revenues from the Adventure Pass program will do to an Agency that is already underfunded and overworked. As I understand it, the Adventure Pass program was, in a roundabout way, offered to the Forest Service as a possible revenue-generating source by Congress after Congress cut the Forest Service's more traditional funding sources.