Re: "If he was using it as a watch he would have glanced at it to get the time"
Mine lacks a clock. But I can ask any of my portable devices to speak the time aloud.
BTW, I currently use my Android tablet to play music in my car. The difference is that I control it with a generic, very cheap Bluetooth device that has all controls I might need while driving (next track, previous track, play/pause, and volume control) as nice, large buttons I can find by touch without having to glance. Think media controls on the steering wheel without having to pay extra for that.