A pioneer of the resurgence in 3D, James Cameron's dedication to the format can simply not be under-estimated. Having been the driving force behind the technology in Avatar's decade-spanning journey to our screens – which went on to gross £2.7 billion at the box office, the biggest in history by quite a margin – Cameron has spent the last year braving the waters in supervising the most ambitious 2D-to-3D conversion ever seen, in bringing his very first billion dollar movie back to the big screen where it belongs.