Do you know it? You look at product details, then want to see the next product, but must first return to the hit list. There you select the next product to view its details, then back to the hit list, etc. - each time associated with waiting times. Pretty annoying, isn't it?
The WindowShopping module is much easier to use: A horizontal bar displays previous and subsequent items from the hit list on each detailed product view. When scrolling within the bar, only those articles that are in the visible area are reloaded for the best possible performance.
With MouseOver, further details for the respective hit are displayed, quasi as a preview of the detail view. If you click on it, you will see the product as usual with all details in the detail view.