And here I am convinced. The film is rigid, does not notice it and it makes the screen look a less fragile because a little less bright and less messy to finger contact as the original. It gives the entire apparatus has a more rugged look inviting to treatment without velvet hands.
Conclusion. There exist two types of protective films. Flexible film and rigid film. The flexible film represents a transitional protection of fragile glossy surfaces before commissioning. They make the opaque surface and disturb the reflection of light. They must be removed if we want a device to look nice. The rigid films, designed to protect small screens offer real protection and offer almost as shiny surface that screens they protect. Since they can be changed at any moment is a good measure to have a stylish and always clean screen making it invulnerable to scratching.