It's not too soon to start obsessing over Loncon 3, the 2014 World Science Fiction Convention, to be held in London in August.

http://www.loncon3.org

The Loncon 3 committee produced a great promotional video that reminds you how many science fiction, fantasy, and horror movies and shows took place with London as their backdrop. And it includes the fabulous "London Calling" by The Clash as it's soundtrack.