Instead of simply indexing individual product listings from online stores, Google has now started grouping similar products together. When you search, Google tries to show group results rather than individual products.
Before this latest update, when you clicked on a title of a result, you would be shipped off directly to a website where you could purchase that product. Now, when possible, you are taken to a screen where you can compare prices for that exact product, read user reviews, and see product specifications -- all without leaving Google.
This is what the service should have been originally. With these new changes, I have a feeling I will use this service more frequently.