This is why comments such "but spy agencies have always been spying, it's their job" have always pissed me off. The spy agencies will continue to encroach on our rights the more "tech is here". We now have "smart" devices with mics and cameras in every room, so they're going to use that.
If 30 years from now we'll use some kind of "bluetooth headset" that actually interacts directly with our thoughts, then they'll use that, too, to screen out thoughts and arrest you for "extremist thoughts". There's no limit for how far these people are willing to go - just because "the tech is here".
And the sad part is the vast majority of people don't understand new tech, so they aren't even aware what's happening until it's way too late. And then it's already "normalized" and the government agencies cry about "how much they need it" and do slight of hand tricks with "look over here, this tech helped us save a kid from kidnapping!" -- "but don't look over there, where we abused it in 95% of the cases for our own twisted and vengeful interests."