[jdost]

To be fair, the portable devices are not yet monitoring all conversations due to battery life constraints. If it were a wall powered device, I would be very wary of it, but until then it seems highly unlikely it can achieve that behavior and not drain the battery in a noticeable way.

[travem]

Well two of the three mentioned (XBox One & Amazon Echo) are wall powered devices so I am not sure of the point you are making?