An interesting discussion.
But (not that I think this is a good thing, but it is coming, and much sooner than folks think) "driving a car" is going to be very swiftly obselete. The enabling technology is already quite mature, and continued advancements are happening at breathtaking speed. Based on knowledge of the tech industry, machine learning and artificial intelligence, and the rather unpleasant fact that the majority of people will choose safety over freedom in most cases, I forsee controlling your own vehicle in a major city will be illegal in about 15 years. Controlling your own vehicle period will be illegal in 25.
On the subject of cell phones, however, my opinion is quite harsh -
1) Cell phones enable and ecourage some of the worst aspects of human nature - the propensity to yack without thought or reason.
2) It is not necessary nor useful for anyone to be instantly available, nor for others to expect them to be so.
3) Presuming that the playing field is equal, no one would be "out of business" if they couldn't use a cell phone while driving. The fact that cell phones were extremely uncommon and extremely expensive 20 years ago puts the lie to any attempt at arguing otherwise.
4) Our culture would be far better off if the fundamental technology that enables cell phones to exist were instantly and permanently disabled - tomorrow. They are the bane of civil society.
Enforcement of using a cell-phone-while-driving ban is actually quite easy, and does not require an investment in new technology - any technology. It's quite simple: If you are involved in an accident, the black box that is in almost 99% of the cars on the road will precisely identify the time of the accident. The cell phone company has a precise record of the time that you were connected on a call (or connected to the internet). If you are found to have had a connection at the time of the accident:
1) You are required to pay all material damages to all vehicles and other property involved in the accident. Ditto for all medical expenses, including "real loss" calculations for permanent disability or death to the other party. This is regardless of the actual fault-finding of the accident itself.
2) You are fined $5000 in addition to paying the damages associated with the accident.
3) You lose your driving priveleges for all but driving back and forth to work for one year. No after-hours driving, period.
4) If mutiple parties involved in the accident are found to have been connected to a call or the internet, each will pay the sum of the damages associated with the accident, in addition to the $5000 fine and losing driving priveleges. The overage will be donated to the local school district.
A second offense will result in the above measures with the addition of loss of all driving priveleges, including driving to work for a period of one year (similar to a drunk driving conviction).
A third offense will result in a mandatory 6 month prison sentence, forfieture of the vehicle, and loss of driving priveleges for a term of 10 years.
It's probably true that there will be a very few cases nationwide of 4th offenses. In these cases, we can simply make it a class II felony punishable by a mandatory 10 year prison sentence.
But I'm betting that most people will learn where the "power off" switch is on their phone - as I do every time I get behind the wheel. I don't even want it to ring, much less answer it.