During the scrolling, you see details of the product - e.g. the Pioneer one in the screenshot above - and there are many ways to filter your search by feature, via tabs at the top and drop-down boxes to the left. One good example is sorting by 'Diagonal Size' (I assume the tabs are different for each product type). It displays something like this:

The green dots signify TVs available with larger screen sizes for a lower price.

After you've chosen a suitable product, it displays more details and popularity measures:

There is plenty of data available if needed: product reviews, ratings, pricing details, etc.

Conclusion

There's a lot going on in the interface, but it all seems to work very smoothly. The green dots were probably the only thing that needed explanation when I tested it. Note that the product also uses the Yahoo Shopping API.

Right now ShoppingPath is hoping to be a meta shopping engine, pointing users to retailer websites to complete purchases. It's not clear to me what the business model is, other than contextual ads. Certainly this kind of technology would be superb at Amazon.com, so long term an acquisition of the technology could be the play. Or maybe white labelling it to various retail websites.