Here's the thing, and not to be a devil's advocate just for the Hell of it, but assault is defined in the USA as "unwanted touching," and that's what happened here, per the story. However, the judge will likely slap this woman (the defendant) on the wrist and all the hoopla will be for nothing.
I've recently had to reenter the world of mobile phones, and I loathe them. There's nothing worse than seeing/hearing people walking through public places on their mobile phones, ignoring the people around them, ignoring cashiers helping them check out at the store, driving their cars in blissful ignorance, swerving and not paying attention to traffic signals, etc. It's sooooooo annoying!!!
It's a convenience to have a mobile phone, and can improve productivity and also enhance our personal lives in ways since it's a helpful communications tool, but when mobile phone technology encroaches upon common courtesy and etiquette (and safety on the roads), we've got to temper it a bit.
:2 cents: