The tech seems neat and all but please stop multitasking while driving, encouraging others to multitask while driving, and building products specifically designed to encourage multitasking while driving.
If you want to work while you're in transit: take public transit.
In the bay though. Holy crap driving here was a wake up call for me. You cannot drive distracted here. I've driven in every major US city. The bay is by far the worst. Yes even then NYC, ATL and Miami. Chicago or Houston is a probably 2nd worst.
At the same time my partner often gets mad at me for refusing to do anything but focus when I drive. So I agree in general but I'm not everyone. This device seems like it will help people avoid incidents.
On the one hand, you might get a few people who would be handling their phone to keep their eyes on the road more.
On the other hand, it might facilitate phone use in a way that people might use their phone now when they wouldn't have before (because handling it felt too distracting but this doesn't). I think this is a tangible risk.
There have been papers published that point out that hands free use isn't anywhere near safe.
Side note: not sure why the downvotes or what the other somewhat strident replies are about. I don't quite agree with you but it's not downvote worthy.