As much as I hate to see yet another motor vehicle law I think this might be a good trend; I drive 100 miles a day just to and from work in metro Atlanta so I see a lot of drivers. And with few exceptions there's no one more oblivious to the road around them than someone on the phone simply trying to talk and drive (and, yes, I've done it too so I'm not being a hypocrite in this comment).
Whether it be a cup of coffee, your cell phone, a screaming fuck trophy, your car stereo, the a/c or heating controls or sumpin' else, many people are easily distracted while driving. Making these special laws to address only one of the many potential distractions doesn't really make much sense. Just sayin'...
Personally, I have a helluva time cleaning my gun while driving.