Underlining the hyperlinked context is a regular feature for Google search results. This feature is being rolled out by Google. Google has tried out several other attempts with respect to larger fonts and several other layouts.

Social media sites like Facebook, Twitter are looking into this particular aspect predominantly and several tests had been carried out with respect to larger fonts and removal of underlining. Danny Sullivan, Matt McGeee and Barry Schwartz are replicating the newer design layouts using their browsers. So larger fonts, more white spaces and hyperlinked content without underlines are the call of the day

News Source:     http://searchengineland.com/google-launch-new-search-results-design-larger-fonts-underlines-soon-185724