I would prefer devices with true mechanical switches that control power, and are disconnect/cover recording capabilities to guarantee what is expected is actually happening.
Nice that they are doing this, but this really should be standard for the majority of electrical devices you buy similar to high end receivers, speakers, microphones, amps, etc. with the powered on/off switch in the back. Once you flip it, there is zero power going through it until you flip it again. This was a huge savings with many high powered equipment that you needed to leave plugged in, but did not want it to drain unnecessary power while idling.
My purism laptop has two hardware kill switches for camera and wifi. The switches remove the devices from the circuit.