"Android is already quite friendly to installing whatever other applications and application stores you want, but what they’re talking about here is allowing rival application stores inside the Play Store. This way, instead of downloading, say, the F-Droid APK from the web and installing it, you could just install the F-Droid application store straight from within the Play Store." US judge says he’ll ‘tear the barriers down’ on Google’s app store monopoly: https://www.osnews.com/story/140502/us-judge-says-hell-tear-the-barriers-down-on-googles-app-store-monopoly/