Step 1: Mounting
Install a low voltage receptacle for remote USB power. Or if you like the setup to be even more buttoned up, use a recessed outlet and install a mains power plug behind the tablet.
Due to the outlet cover being bumped out from the surface of the wall, a piece of veneer was added as a backplate and mounted to the drywall.
The Koala Damage-free Tablet Wall Mount Dock by Dockem clips are held on with 3M Command strips.
Step 2: Recessed Power
An AC-USB adapter that was setup for 90 degrees is ideal in this case, and the whole setup is kept flush to the wall.