Sorry if this has been covered.
Usage-based internet billing is on the way. Peak internet traffic is between 6pm and midnight, and I expect there will be steep discounts for off-peak usage. It may become useful to have a "DVR" function so programs can be downloaded to an internal or external drive during off-peak hours, and watched at any time.

What does this have to do with Soundbridge? Please pay attention to what forum you are posting in.

If you are talking about the Roku player streaming video device, DVR like storage is impossible. There is no hard drive for anything to be stored on.