I'm curious if they are counting the cameras in cars. Each Tesla has 3+ cameras that actively record when in Sentry Mode. A Costco parking lot in Silicon Valley will have a dozen parked at any given time. That's another 36+ cameras. I can easily imagine a police investigation requesting footage from owners who may have had active recording during a crime.

The number of cameras will increase dramatically in this additional dimension, particularly as other manufacturers start adding surveillance to their vehicles.