Being overheard isn't the only privacy concern. Most of these solutions offload the speech recognition and language parsing functions to corporate servers. I like texting with Siri but I'm not exactly keen on having Apple record everything. It also seems limiting in that I can't use voice commands without a network.
It would be nice for voice recognition platforms to start being built in. I know there's training data that's needed, but there's some convenience afforded.
This actually doesn't seem to be the case. Take a look at Google Translate's offline voice recognition AND translation - it's really amazing, considering it's all happening on your device.
I forget where it was, but they published something about training a very small very fast neural network that could fit comfortably in the phone's memory. Tricky tricky. :D
But he or she is less vulnerable to being automatically hacked by a three letter agency, foreign government, and/or hacker gathering data for identity theft.
The privacy concern _isn't_ necessarily about having something to hide. It's about the consistent hacking of major systems, and exposure of personal data.
And you don't think there are privacy concerns with that? It is a /very/ intimate relationship, and generally requires some ritualized/formalized interaction, and a very high degree of trust.
It would be nice for voice recognition platforms to start being built in. I know there's training data that's needed, but there's some convenience afforded.