"In Windows 8.1, the Search charm will provide global search results powered by Bing in a rich, simple-to-read, aggregated view of many content sources (the web, apps, files, SkyDrive, actions you can take) to provide the best “answer” for your query. We think this will really change the way you interact with the Web and with windows making it quicker and easier to get things done. It is the modern version of the command line!
Quick actions include things you would want to do like play a song or video. Results from local files, apps, and settings are easily accessed in the same convenient view by scrolling to the left."