It seems that we need to project the reality of driving through the mobile device. Maybe talking to someone on the phone while they're driving should require you to watch a video feed of the road, and hear road noise. Then you'd avoid talking when something difficult was happening in the car. I've believed for awhile that VR technologies should be able putting two people in the same space (and in particular, not putting people in two bland but equivalent spaces), since it improves communication and interaction.