The web is full of sites which provide a shopping function like this, in which a chosen region of a product image can be shown in close-up.
So, the bits people look at can be used as a way to discern what they want to buy. If they pay attention to the fur collar, the zip, the pricetag, that tells you something about their interests. Whether they buy or not, you get a wealth of information about their priorities.
Today’s invention is a tool which simply monitors the close-up window’s placement sequence and spots patterns which enable enhanced product development decisions. If a number of people leave the page without buying, having just seen the details of the leather grain, you know something needs fixing.
The tool would also do some tricks like issuing messages such as ‘was it the [leather]? Maybe look at these items instead…’ It might even be possible to offer realtime, personalised discounts: ‘Maybe it’s not exactly what you were looking for -so how about 5% off?’