Personally, I think the long-term future of television is a largely VOD system with very little broadcast in the way it is now. Programmes will still be "released" to the VOD systems on a schedule (i.e. new episode each week) but it'll be up to the viewer when to actually watch them. In this type of future, a broadcast system such as Sky's doesn't have much place and I think they know it. This is why they've moved so strongly into Internet provisioning over the past couple of years.
ps. anytime downloads content to your sk+/HD box overnight right? via satellite? so it doesnt use your own BB connection.