cre8pc - 3:00 pm on Jul 8, 2013 (gmt 0)
The layout appears to vary. For example, I ran a search for berberine (an herb) and the upper right was a large box with products, with nothing much underneath it and regular SERPS on the left.
A search for bikes brought back the typical layout with product images on the left side with SERPS
Another one for fringe boots was the big box of product images in the upper right again, with PPC ads filling in below.
I like the big box in the upper right for a quick view of products.