We've had this law in Chicago for quite some time.  I work mainly in the suburbs and always have to remember when I cross into Chicago limits.  I have my bluetooth earpiece but I rarely use it, and I should.  In fact, I just took it out of the car, where it's sat with a dead battery for some time, and plugged it in last night.  I use it so rarely that I forgot how to work it when I finally remember about it.  

And I do hate when people are in public places yakking on their ear piece.  One time I thought a man was speaking to me and I'm sure this has happened to many people. 

Sean - I watched a show about the World's Worst Drivers and I did see cops stop a woman for applying make-up while driving.  Of course, laws differ but I'm wondering if those might be illegal in more places than we think.  

Cindy - although I agree with you somewhat, it make me giggle wondering how I (& even my children) survived when there were no car seat or even seat belt laws and many of us survived.  Of course, we didn't have cell phones but even talking to our kids or other riders or listening to music can distract us just like speaking on the phone while driving.