It has been announced on Techradar that Sky Movies will shortly rebrand as Sky Cinema. This will coincide with scrapping of the HD supplement on all platforms. However, if you subscribe to Sky Sports as well don't get too excited, as the HD supplement remains for Sky Sports, or Sports & Movies combined.
http://www.techradar.com/news/home-cinema/credits-roll-on-sky-movies-as-sky-cinema-is-born-1323419