Comment by t_mann

It's not just the je ne sais quoi performance aspect that I'd be concerned about, it's something I'd call Wii-Sports-ification: the first time you try out movement-controlled games like they made the Wii console popular, you'll likely put a lot of effort into the movements as if you were wielding a real tennis racket or a golf club. After a while, you realize that the motion sensor is much more coarse, and you do much more efficient, bastardized versions of the original movements. While I acknowledge that this system is supposed to be much more sensitive, I'd expect a similar effect to be happening once athletes get their hands on those machines in training: they'll figure out how to best trigger the detection of each move, and how much flexing of the toes, bending in the back and overall effort is just enough for the machine, and it's going to change the look and feel of the sport.