I haven't seen that carousel yet. This morning, I noticed a "more like book x" carousel just below the cover and the product description. Customers could choose from "in this series," "by Bill Hiatt," and "customers also enjoyed." That's right--it's three carousels in one, though there's still a related products carousel further down the page.
No, wait, it can be more than three-in-one. I see one of my titles also has two genre carousels as choices as well as the other three.
I imagine it's an experiment, but it's an interesting way to combine multiple functions in the same screen real estate. It enables customers to call up selections in different ways without having to use search terms.
This appears to be a possible replacement for the current series slider.
An older change--if I search for myself in the Kindle store, the top of the page has my picture, five popular books, and my bio. That's been around for a few months.