Take a photo. Sounds simple enough … except there’s no camera app by default on the Nexus 7. So that means the camera only activates when you’re using an app that needs it, such as with a Skype video ...

Wouldn't 'tap to turn on' use up the battery when in sleep mode? I'm thinking of the tablet sitting inside a backpack always getting bumped by something, and the touchscreen circuitry has to remain ...