Another factor: If you watch a film in the cinema then the surroundings are almost completely dark, which makes it easier to see what's going on on a dark scree

Another factor: If you watch a film in the cinema then the surroundings are almost completely dark, which makes it easier to see what's going on on a dark screen. However we increasingly consume content at home where there is typically more ambient light, especially if we don't choose to turn off all the lights just to watch tv as other family members may be doing other things and find it annoying.