Technology has been developed that allows cameras on billboards to "gather details about passers-by — their gender, approximate age and how long they looked at the billboard."
No, stay with me.
"TruMedia’s technology is an offshoot of surveillance work for the Israeli government. The company, whose slogan is “Every Face Counts,” is testing the cameras in about 30 locations nationwide. One TruMedia client is Adspace Networks, which runs a network of digital screens in shopping malls and is testing the system at malls in Chesterfield, Mo., Winston-Salem, N.C., and Monroeville, Pa."
And because it was the first thing that I wondered, too...
"So far the companies are not using race as a parameter, but they say that they can and will soon."