As a matter of fact, you are driving. You're just not moving for that period of time. But you still should keep your eyes on the traffic, not on an eInk screen.
Well, people have been known shaving, dressing, applying their make-up, searching for something to eat in the glove compartment, binding their shoes - so, sure, why not reading?
But friends don't let friends read and drive, so I'm just caring about your safety.

And all those innocent bystanders in Northern Virginia.