It seems Google has increased those tests, as we are seeing more and more searchers post about seeing these updates on Twitter, Facebook and other areas. Both Danny Sullivan, Matt McGeee and myself are able to replicate the new design either using our native browsers or via incognito mode in Chrome. - searchengineland
Here is a side by side image of the old and new user interface for Google’s search results:
You can click on it and notice the side by side comparison showing the larger font, more white space, no underlines for hyperlinked content and more.
Here is a zoomed in view of the old design:
Here is a zoomed in view of the new design:
via http://searchengineland.com/google-launch-new-search-results-design-larger-fonts-underlines-soon-185724