Most Europeans will prob. know it already, but for everybody else: Laax has recently opened a freestyle hall and a freestyle slope.
Have had a go some weeks ago - really good stuff. The freestyle slope features rather easy obstacles, but it's 2,5km long and has 2.000ft vertical drop. It's quite nice to jib for several minutes without having to walk/lift back up. The hall is super fun and everybody is having a blast. Needless to say the "real" parks on the mountains are still the best in Switzerland. The only thing that sucks are the prices (55€ for a single day lift ticket).