Like gesture control this won't be well received when it hits the market then the naysayers will make fun of it and complain on how useles it is then a couple years later it will be an industry standard pioneered by BMW like it has with most technologies we see today.
Have you tried gesture control on the 7 Series? I have and it simply doesn't work. And that's before we even discuss whether it's useful or not.
This new system will get my approval if it both works and actually makes operating functions on the car easier.