Cisco is being rumored to be working on a high-end DVR that will be sold under the Linksys brand. According to Business Week this box would feature both DVR capabilities as well as wireless networking so you will be able to stream media to any TV in the house.
Of course this is not yet official so don’t get your hopes up to high just yet. Its also not clear to how it will be sold, whether through retail stores or be made available though cable providers. I for one would gladly pay for this, it would be nice to be able to have and set one DVR and be able to watch content on any TV in the house.