It wasn’t that long ago that Google brought Google Now notifications to the Google Chrome Canary build, which is more like an “alpha” in traditional terms. The feature required users to explicitly enable it using flags. It seems to be ready to go for the more stable and more popular beta channel. What’s more is that the feature is enabled by default in the latest build.
To use it, all you have to do is make sure you’re signed in using the same Google account you use on your Android or iOS device. From there, you’ll be served automatic notifications about what Google thinks is important to you on Mac, Windows and Chrome OS computers. Neato!
Google has more details about Google Now on Chrome in their help FAQ. Of particular interest is location settings between multiple devices. Google tells you all you need to know about maintaining separate location information for all your devices if you don’t want to do it based on your phone’s location data, so be sure to give it a read if you’re interested.
Otherwise, grab the latest build in the beta channel and go nuts. Should all go well, we should be seeing this hit stable status before too long. PS: English is the only language available right now, but Google is working to add more in future updates.