Forgot about the ball tracking system. That may be cool. The ring in wrestlemania is good too but reminds me a little of the shadow. I'm really keen to see something revolutionary like moving 3d targets that explode and you need to chase and aim for (similar to p2000 but better). The tracking system may be the answer.
One other thing I am tired of and sterns don't have too much of this is the stop/start rubbish. I love my tz but am now realising how much of my game time is spent waiting around. Maybe thats why my space invaders pinball get a fair bit of play????