You're living in a book. Get back in the science forum.Very interesting thread, on several levels.
An AI wouldn't necessarily have any dedicated hardware.
Likely the first AI (whatever that means) to exist would probably have escaped from a research lab where it existed as a virtual/software representation.
As a an autonomous entity in cyberspace it would have the same abilities as black hat hackers. It doesn't need to punch you in the face, it just needs to
- update your IRS information to show that you owe $3 million past due
- update your FBI file to show that you're wanted in fifteen states for threatening the president
- update your medical records to show that you have ebola + smallpox + bad breath
That destroys your life. Now apply that x10 million times, and you've destroyed the whole country by overloading the system with too many false positives.
Point that hasn't been mentioned -
Likely there would be at least several free roaming AIs, who may or may not be friendly towards humanity.
Disagreements between those AIs (how best to kill humans, how best to protect and help humans) would play out in cyberspace with disastrous effects on our infrastructure.
Most networks would be effectively destroyed and anything plugged in to the webs would stop working - water, gas, electricity supplies; food supplies would not get routed to where they need to be; shipping and planes would be effectively grounded.
We could end up being thrown back to the stone age as collateral damage from an AI war.