I got notified from a text via a friend who closely follows the Ukraine/Russia war. Several news outlets are providing live updates. If Prigozhin takes this to the extremes (a full militarized coup attempt in Moscow) and the senior leadership fails to contain it, then it is very bad for Russia. On the other hand, if they contain it quickly things could be back to normal on Sunday.
Who knows, I'll wait and see. Since this is the first post about it on HN I figured I'd put my comment here.