Films are made for the big screen. They demand an immersive environment where the viewer's whole attention rests on the images in front of them (unless you're one of those people who live-tweets every film. In which case, just, don't.) and the loud surround sound. That's the main difference between a film and a good TV drama such as Sherlock - films are best seen in the cinema. So the film industry is constantly searching for ways to better this experience - higher resolution 4K screens, better laser projectors, 360° sound, etc - and the latest, biggest advancement has been 3D. Whether you're a fan of 3D or not, there's no denying that it has taken off massively: brought into popularity by big releases such as Up and Avatar in 2009, it is now the standard for big-budget action or sci-fi films, and pretty much all animation. And with the increase in 3D films being released, the studios have turned to their back catalogues and begun to re-release older films in the format, benefiting from advancements in 3D post-conversion, which can be done brilliantly (as in Gravity) or really terribly. I'm looking at you, Thor. So far, we have seen 3D re-releases of Titanic, Star Wars: Episode I, Jurassic Park, Battle Royale, The Nightmare Before Christmas, The Lion King, Beauty And The Beast and the first three Shrek films, as well as Pixar's Toy Story, Toy Story 2, Monsters, Inc and Finding Nemo. Pixar has also just announced upcoming 3D re-releases of The Incredibles and Ratatouille, almost completing their library of films to be converted, alongside their announcement of The Incredibles 2 and Cars 3, showing the current collection of 3D re-releases to be far from complete. This list will discuss some of the films most eligible for 3D re-releases, starting with the most likely and working down to the never-in-a-million-years. But they would all be spectacular!