Attention Shoppers: Your profile and behavior being analyzed at aisle five

From the online edition of the Wall Street Journal (paid subscription required): video cameras being used to analyze customer behavior.
Why bother your customers with surveys and interviews? Just have computers analyze what the hidden cameras see about your customers' browsing and buying habits.
Ethical implications (and late-night talk-show jokes) aside, there are companies dedicated to “video mining” of retail shoppers, like Advanced Interfaces and ShopperTrak.

Will this translate to better service, lower process, or more options?

In the meantime, I’ll try to keep my sunglasses on while I shop.