If we trusted our devices not to spy on us, it would be a useful feature for a Smart TV to start up but leave the screen off when it detects someone walking int

If we trusted our devices not to spy on us, it would be a useful feature for a Smart TV to start up but leave the screen off when it detects someone walking into the room, so that by the time they find the remote, sit down, and actually press the power button to turn it on, It just has to turn the screen on and appears to start instantly.