It goes without saying and makes complete sense search engines like Google and Bing continuously keep testing new things to try and improve their product. Why wouldn’t they, they are no different to you and us testing new things with our products.
The other day we saw a new carousel on Google when searching for Oscar information.
As you can see the carousel fills the whole screen, it doesn’t matter if you are viewing on a small mobile screen or a large high res monitor.
A nice new development, we will see if they continue to use.