One of the things (as someone who studied film in school) is HOW the screens/systems are used differently depending on whats needed. Spiderman, for example, is mostly left-to-right motion of the cars, so the screens are flat. But in the free fall, the screens are deeply curved because it needs the effect of foward motion. Its an old trick first used by Cinerama in the 50s, that curved screens can simulate motion. Transformers, on the other hand, is a lot of forward motion, so the majority of the screens are deeply curved. However, since the 'squinching' effect doesn't work so well when the vehicles move left to right, sideways motion is reduced (hence why Tranfsfomers feels to stop and go). On the other hand, Kong has to simulate forward motion while not looking ahead, so another trick is used. Douglas Trumble discovered the faster the frame rate, the more the mind interprets it as real. So using 70mm at 70fps he was able to create ShowScan that created the illusion of movement and reality. So Kong is projected at 60fps, which sells the illusion. (T2 is also slightly faster than the normal 24fps but no where near that high. Its difficult enough to synch up 6 70mm projectors). There's a couple of other tricks thrown in. So its not just simple screens, but actually a combination of type of screen, projection system used and how its combined with a theater.
