RSDVR is going through a renaissance. The business and technical success relies on legal interpretation of copyright. In case you missed it, a few months back CopyHype carried an in depth legal opinion on RSDVR by Terry Hart. The opinion explored some of the issues around Cablevision and Aereo. Particularly it explored the legal definition of public performance which is an important part of the overall legal argument. For those looking to place bets in the RSDVR space, it is worth a read.