Apple can customize the UI and the search results on iOS devices if they want. Apple can take Google's search results (without Google's ads) or Bing/Yahoo, format it, add information from Yelp, Wikipedia, Facebook, Twitter, WolframAlpha, etc. Make this format the default "search results" and make it universally accessible from Siri, the browser, apps, and so on...
Apple can customize the UI and the search results on iOS devices if they want. Apple can take Google's search results (without Google's ads) or Bing/Yahoo, format it, add information from Yelp, Wikipedia, Facebook, Twitter, WolframAlpha, etc. Make this format the default "search results" and make it universally accessible from Siri, the browser, apps, and so on...