I get your point, but this is inaccurate. Advertizing has always been targeted based on the demographic most likely to see them - deciding to air a TV ad during Saturday morning cartoons, during a football match, or during a soap opera has very meaningful differences. The only change now is that the granularity of information available for targeting has increased.
It used to be surveys few could voluntarily filled out that were interpolated onto similar demographics, or based on purchases.
Now advertisers can track you directly where/when you go, without your permission. Your search and purchase history forever remembered, your location verified, your friends identified.
With such level detail we will soon have custom pricing to maximize profits.
