I watched several new reports addressing the SCOTUS decision in limiting the EPA's power. All of them have speculated that this is a landmark decision that will likely have a ripple effect across the entire federal executive branch. Having read the decision this morning, I'm of the opinion that this decision will be used to curtail the unconstitutional power of federal regulatory agencies when they attempt to make laws that have far reaching consequences. This will blunt the effect of a president's executive orders to a degree.
I suggest that you keep an eye on the analysis. I'm hoping that John Turley might appear on FOX or some other news channel to talk about it. He generally hits the nail on the head. If I'm right, we might see this case used in arguments against the ATF's overreach, in some future court case.