Specially the Samsung Galaxy Note 4 and S6 have curved edges. Original PanzerGlass will not be able to cover this, as the silicone adhesive is unable to adhere to the curves, which creates air bubbles. PanzerGlass does still give a major protection for your mobile device and prevents damage and scratches. You can see an example of the PanzerGlass on the following picture, how it will look on the Samsung Galaxy S6.
As you can see on the last picture the PanzerGlass is lying flat on the screen of the phone. At the edge there is some air under the glass because of a tiny curve on the screen which is not that visible. That’s why the glass for the S6 is only covering to exactly that point.