1. If you want to protect it, you had better stick film for it. But if you want to use it more comfortably, you need not to do that. 2. The screen of ipad air is a anti-fingerprint coating. Even you cut its screen with a knife, there will not be scratch. But if you stick film, it will affect light?transmittance. So sticking film is just consoling yourself. It is not suggested to stick film. But without filmor other treatment, there will be many fingerprints and dirty streaks.So it looks bad. It you stick film, you can wipe it freely when it becomes dirty. It is easier to clean and you don't have to worry about it.
If you cherish you ipad, you had better stick film. But I never stick film because there is a cover covering it so that it is not easy to be scrtached.
