How long before we have a real time view of the world - with all the millions of smart phones, cameras, public security cameras all pushing data to the web? Kin

How long before we have a real time view of the world - with all the millions of smart phones, cameras, public security cameras all pushing data to the web? Kind of feel like those Circle/Social cam guys had something there - a real time distributed camera. There's a startup up there - but maybe instagram has already done it :D