Emergency Situation...
I am in charge of the Lawrence Community Emergency Response Team. We are volunteers who volunteer to help out in major incidences. We just had a minor train accident that ripped open one car and dumped 1200lbs of chemicals. The are had to be evacuated. If the first person onsite had this ability and was able to link to the necessary departments, ie police, fire, FEMA, MEMA, County HazMat Team. The amount of information visually available could expidite the appropriate response.
The ability to send live feed during an Emergency situation could revolutionize Emergency Response. The ability to monitor teams on on-site live from a central location could save many live. During search & rescue, providing medical evaluation live from a crash site then forwarding the video to not just the local ambulance, hospital, but specialist around the country.
Then just being able to see the grandchild's birthday party.
The uses are only limited by your imagination.