A company called NDS seems to have made the first Peer to Peer Digital Video Recorder that lets users share recorded videos with anyone on the P2P network. What does this mean to you? Well, here's an example.
Ever since our good friend moved to the east coast, we've had a hard time watching episodes of 24 together thanks to the time difference. But if he could record the show on EST, I could download it from him (and everyone else on the east coast who recorded it) and be ready to watch it simultaneously with him. With IM or Skype, we can even get real time "oh my god Jack did NOT just do that!"
Of course, there are other uses like downloading shows that you forgot to record from other people, but we're looking forward to the simul-viewing.