If you're a Comcast subscriber, there's a good chance you're already using the Xfinity TV Player app. The problem is, though, if you're not around a Wi-Fi connection and want to watch something, you're just out of luck. Well, you were out of luck anyway - the app was just updated to allow certain content to be downloaded and viewed offline. That's awesome.
Among the downloadable content, you'll find TV Shows and movies from Showtime, Starz, Encore, and MoviePlex.