Google will allow "power users" sideload apps from unverified developers
liliputing.com>There will be a new developer “account type for students and hobbyists” that allows “you to distribute your creations to a limited number of devices without going through the full verification requirements.” This is aimed at folks who just want to make a custom app for friends, family, or other small groups, not those who want to make their apps widely available though
I don't think that's "sideloading" .this is just what they were always gonna do but state differently. Hows that gonna work for f-droid etc?
Look at the next sentence in the article.