TiVo has just enabled the video downloads feature on most boxes. It appears you will eventually be able to pay for content, but thus far it's more of a "download this new music video" kind of stuff.
Use this setting to enable a DVR to download TV shows, movies, and other video content from the TiVo service over your broadband Internet connection. Specific program offerings will vary from time to time and may not be available to all subscribers.
Tivo Inches Towards Video On Demand [RealTechNews]