Imagine how long the devices would stay on the market if owners started being held liable for what the device does.
I'm not suggesting the device be made illegal, but I do think a ton of common applications should be... and without those applications, the device loses viability.
I imagine they will face the same market consequences that smart phones, security cameras, and other devices that have the potential to be used to record people in private places currently face. Customers with a low tolerance for being recorded simply just won't buy.
Security cameras often explicitly lack audio because of these laws. The other devices you mentioned all have primary functionality that doesn't depend of recording nearby audio arbitrarily. The possible exception is Siri and Google's assistant, which fall into the category of services/devices being questioned in this instance.
I'm not suggesting the device be made illegal, but I do think a ton of common applications should be... and without those applications, the device loses viability.