“We conclude that the Federal Circuit’s formulation, which tolerates some ambiguous claims but not others, does not satisfy the statute’s definiteness requirement. In place of the “insolubly ambiguous” standard, we hold that a patent is invalid for indefiniteness if its claims, read in light of the specification delineating the patent, and the prosecution history, fail to inform, with reasonable certainty, those skilled in the art about the scope of the invention.”
I gather it means one cannot write a vague patent, and then claim anyone who infringes on the principles is violating your patent. But that is just my guess...
http://www.supremecourt.gov/opinions/13pdf/13-369_k53m.pdf
That was my take also. Gotta be able to show a specific infringement not a general/vague infringement.