I'm assuming you're looking to know if it's improved it's support for multi-display setups and the answer is pretty much no. It allows you to choose which display your fullscreen app appears on but it still consumes both displays whether the app needs it or not.
This is a major bummer IMO and something I hope they figure out quick. Unfortunately that doesn't seem to be happening as it survived Lion into Mountain Lion obviously. Full Screen apps would be fantastic if they fixed this.