What you should all be fearing is bot swarms and drone swarms becoming cheap and decentralized at scale online and in the real world. They can be deployed by anyone for any purpose, wreaking havoc everywhere.
Every single one of our systems relies on the inefficiency of an attacker. It won’t any longer be true.
Look up scenes like:
https://m.youtube.com/watch?v=O-2tpwW0kmU
https://m.youtube.com/watch?v=40JFxhhJEYk
And see it coming:
https://www.newscientist.com/article/2357548-us-military-pla...
Also ubiquitous cameras enable tracking everyone across every place, as soon as the databases are linked: