Yahoo appears to be testing a new type of search results that resemble Google's Knowledge Graph and Bing's version of that.
Here's what it looks like for a search for "Apple," followed by Google's and Bing's results for the same query for comparison:
As you can see, the look is quite similar, though Yahoo's results are a bit different. They have, at least for these examples, a "Top Products" section for those looking to do some shopping. There's also a "You may also like" section, which puts competitors right in front of users. It's also missing some of the info provided by the other search engines like stock price, CEO, founded date, etc.
It's worth noting that a search for Apple first took me to a page showcasing a local search result box on the right side pointing me to the local Apple store. I had to click another box to take me to the Apple results pictured.
All Google also has some steps for enabling the test yourself, though some have had trouble getting it to work.
While it's just a test, Yahoo would do well to have this kind of thing if it's going to make a legitimate case for replacing Google on iOS. It also recently replaced its local business reviews with those from Yelp, which could also help (though some businesses are pretty frustrated with the change).