There is a reason I might consider getting whatever replaces S970, maybe sometime next year. It's because my aging wrists and fingers have less stress playing those little soft-feeling keys. Even the PA4X is starting to give me soreness after four hours a night, every night. I don't play hard, but you have to use enough pressure to make the touch and effects kick in.
What is a game-killer for many players, would be an asset to me.