And honestly, I'm not against a microphone that's always on. But I am against a microphone that sends what it hears to the cloud, to be owned, stored and processed by some third parties in unknown ways. Ambient computing is a very fine concept on its own - but what it needs is to be pried out from the hands of commercial entities driving it. It should be implemented in such a way that the user owns the data, storage of that data is entirely decoupled from the software that's being run on it and from the cloud that brings the two together. That is, I should be able to choose software that operates on a data I own, in a place I want it to, and that software should not exfiltrate that data.
I guess it won't happen without a long legal fight that's still ahead of us. But until then, there's no way in hell I'm going to let such a device be anywhere near my kid.
--
[0] - It's funny how the name emphasizes the speaker aspect, whereas the core competency of such devices is the microphone.