Re: "0.8 per cent of the 2800 mAh battery per hour"
I don't understand your comment. What's already been solved? And where does a sensor come into it? This isn't like Marshmallow's Ambient Display where the info appears when the sensor is activated - the screen here is always on. And even Ambient Display drops the standby battery life on the Nexus 6 from 330 hours to 250 hours.
So I repeat my implied question - what exactly is the benefit of this battery drain?