First, it will be an interesting ("exciting") option.
Then, it will be a discounted, but "highly recommended" option.
Then, there will be a multitude of anecdotal media reports about how it could have prevented X, Y, Z, and it's such a shame the victims couldn't have been spared. We should all really get it, you know.
Lastly, it will become mandatory, but only after manufacturers make a sh!t-ton of cash charging for the "option" in the year or two before it happens.
Once again, logic and training will be trumped by the culture of fear and litigation. Oh, and the guys that serve to make tons off of another "compulsory" safety feature.
Great idea, but enough is enough. BMWs used to be for driving, not riding.
You will have goosepimples.