At CES in 2005 DirecTV was promoting the concept of recording and playback on arbitrary receivers throughout the home. You could start watching a show downstairs and continue it upstairs. While either of those boxes was recording something else.

This was their initial preview of their own (NDS) boxes. They didn't have a concrete feature list of what would and would not make it into production hardware, but it's obviously something they cared enough about to promote, so it seems like it would eventually materialize. I don't think you could share shows like that with any TiVo model when they were showing this at CES.