Fun fact: this was originally done in Square's Card Case (by Robert Andersen, who coincidentally used to work at Apple). The hologram on the credit card used to change with the angle of the phone.
I think this is not true. Apple doesn't let you change icons on the home screen. Apps dont have that kind of control. Does it?
I don't think he's referring to the app icon, but rather the hologram within the app.
It was a hologram inside of the app...
In-app hologram when you edit your credit card. Unfortunately this is not in the shipping build of Pay with Square, but it was there in Card Case (and was epic!).