Yahoo is testing a new design for their search results page. The new design is drastically different, making the layout much more boxed in, more like a card look, that would work well across both desktop and mobile devices.
This was picked up by @rgomezric who shared this screen shot on Twitter:
The current design looks like this:
Here is a video of the new Yahoo design in action:
Bing is also testing a new design and Google is always testing also.
Forum discussion at Twitter.