This is not completely new - I have seen an article mentioning it back in August. This "Review" layout of the SERPs has also been recently discussed in this Search Engine Watch article:
4 Google Carousel Optimization Tips
The sample screenshot provided was pretty much the same as the second screenshot in this searchenginewatch post.
It is interesting what you say that on your laptop screen size there were no organic results visible at all, despite the SERPs having no carousel at the top.