For the first time, a parent who is a Comcast customer can download (not just stream) a movie or TV program and keep it on their mobile device for up to two weeks. Previously, you would have to be on a Wi-Fi connection and stream it when you wanted to watch it. Now, the Xfinity TV Player app makes it a lot easier.
In other words, !SERENITY NOW! for long car rides and airplane travel. Thank you, Xfininty!