He still has many other prisoners from around the world arrested on shaky grounds. The military exercises, if we actually do cease them, are a huge concession and if we pull soldiers off the peninsula we are asking for trouble. Just the fact that Trump gave him equal footing is a concession unto itself. The things he didn't discuss are troubling as well. Personally I think nothing more will come of this. Trump next meets with Putin, seems he is attempting to build a wall around himself for protection from within with his one man diplomacy tour. A lot will be said, boasting and hyperbole, but nothing of substance. I believe he thinks that will give him immunity.