US models of the Motorola Moto X smartphone that are running the Android 4.4 KitKat upgrade received a notable update in the Moto Assist feature which automates tasks when you are driving, in a meeting or sleeping. The latest update brings the ability to respond to text messages via voice when the Moto X senses you are driving (which it can do with it's motion co-processor). This is good news for all Moto X owners since it will extend the functionality of their device when the update is made available by their respective country carriers. I plan on testing the new Moto Assist feature on my developer Moto X to see just how much of an improvement the update brings.