To enable the new Voice Search Hotword ability, all you need to do is head to the Chrome Web Store and download the extension. At that point, you'll be able to talk to your laptop totally hands-free, like it was a Moto X or an Xbox One. To activate the feature, simply say "Ok Google" followed by your search or command. You know the drill.
Whether you need to start a timer, look up unit conversions, or dates, or whatever, Google's voice command will listen, and relay back to you out loud. See, the holidays don't have to be so lonely after all, kind of. More here.