"Google searches just keep getting more personal. The company's latest idea: Integrate Gmail emails into search results, so when you search for something like "flight" on Google, relevant messages from your Gmail account—like the confirmation for your upcoming trips—will show up alongside normal results. Gmail will only be searched for certain queries, including names and locations, PC World notes.
Currently, the service is available as a trial, and writers from both PC World and the Next Web approve so far—although concerns could arise from the fact that anyone borrowing your computer will effectively have access to your Gmail account. Ultimately, Google's goal is "Universal Search," a single search to encompass everything you might be looking for, with results taken from Gmail, Google+, and other sources in addition to typical web results. Google also previewed more enhancements to its search, including a voice search the New York Times deems better than Siri, yesterday in San Francisco." - newser