New York Daily News:

The iPhones, much like their Nokia predecessors, mark a quantum leap in policing, where everything from 911 dispatches to criminal background checks and real-time video can be quickly accessed.

When cops are responding to a job, the phone will automatically provide them with the criminal history of the location, such as how many 911 calls have been at the address in the past and what type of calls. The phone also tells the officers if any wanted felons are at the address.

All of the information is prioritized based on the emergency the officers are responding to.

It would be really interesting to see how this works in the hands of the police and the backend data management would be an immense challenge.