4getmenot. It is possible to get 'old' movies in HD and Blu Ray. I don't quite know what process they use to change to HD, but it is possible. I have recently purchased Enter the Dragon on Blu Ray, and the quality is exceptional for a film made in the 70's.
1240kath, I have had Sky HD since January, and it costs me an extra £10 per month. Some of the HD programmes do not seem much better than standard, but some of them are excellent, especially sports and the nature documentaries. Sky HD is still nowhere near as good as Blu Ray though.