It's only binding on states in the Sixth Circuit, but in addition to Ohio they include Michigan, Tennessee and Kentucky.
You'd have to read the opinion itself to know whether the decision is based on something specific in Ohio state law that is different in Michigan, for example.
That was the basis of the 7-2 Florida ruling by the Supremes in 2000. Typically the media concentrated on the 5-4 rulng on "equal treatment".