As you all have probably heard by now, half of the big studios and networks are suing Cablevision for their DVR service, due to copyright issues. The disagreement here relates to how the service that Cablevision offers is defined. By Cablevision's definition, the company is offering a DVR service, with the only difference being that, instead of allowing customers to record shows onto a digital hard drive or a disc, it is stored on secure customer space within Cablevision.
All the companies who file the suit say that this is not DVR but instead video-on-demand because the "recorded" material remains in the hands of the company instead of recorded directly by the consumer. They claim that such movements will cause damage to all the new and innovative services that they are offering, such as mobisodes, iTunes downloads, web streaming, video on-demand, etc.
To me, though, this just seems like displaying insecurity with their own technology. If they are confident that viewers want web streaming or mobisodes or any of these other products, then Cablevision's technology won't be a major factor. True innovation won't be protected by stifling the innovation of others. Of course, I may not be grasping the whole story here, but it seems like yet another prohibitionist move motivated by scared companies who are worried about giving up too much control.