Interestingly I think as for the 2010 Xmas special , theres a number of reasons it will sell well, especially on Blu Ray.
It wont be available on the next 2 series box sets (there is to be 2 separate sets next year for series 6 and 7) over the course of 2011.
The running time is longer than previous Xmas specials and indicates good value for money for the consumer.
and there is to be a very long and detailed Confidential and a few other items included.
The title which is available to certain distributors is interesting too. It amazing it hasnt gotten out yet.
The 2010 Proms will most likely be on there too.