Here is the opinion in McCracken v. Easley — mccracken-v-easley (via Pechanga and TV):

Strange case. Without any discussion except one sentence, the court struck down a state law ban on video poker, a ban that excluded tribal gaming in accordance with a Class III compact. The sentence is: “IGRA does not permit a state to ban the possession and operation of video gaming machines elsewhere in the state while allowing their possession and operation on tribal lands.”

I’d like to see the briefs, but all I can say is … baffling. Of course IGRA allows exactly this kind of law. IGRA allows tribes to negotiate and execute Class III compacts with states that have not banned gaming outright. And even if the state bans all gaming post-Class III compact, the compact will continue until it expires.