Forum Moderators: Robert Charlton & goodroi
You can test this yourself by opening the Google app and searching for the name of an app. It will appear at the top of the results with an install button—this part is true for everyone. However, most people are booted into the Play Store when they tap it. Those with the new feature will see a permission popup just like they would in the Play Store, then a miniature Play Store frame appears so it can be installed. It's really neat. Google Testing App Installs Direct From Mobile SERPs [androidpolice.com]