Originally posted by abruzzi the tablet should be fine for backlighting since the diffuser glass should eliminate pixels. Shooting at an angle is problematic, but you can get away with it to an extent if you use a narrow aperture.
Should eliminate pixels... but at the cost of what light loss - from an already dim source?
Regarding the angle, you can get away with it from the point of view of DoF, not of distortion, and the ensuing quality loss when you have to stretch/straighten.
I stand by my initial impression: not the best presentation for a product aimed at a very specific use case.