First, Russian fortifications that would have repelled a D-Day type assault (which Ukraine is not capable of) have now been totally flooded out, the trenches collapsing and a lot of those dragon's teeth in neat rows tumbled and swept away by the current.
Second, this is a huge PR blunder if traces of explosive are found in or around the turbines, a long shot but possible.
Third, the Russian held left bank of the Dnipro is going to see the worst flooding, I guess nobody looked at a topographical map.
Fourth, there was no order to evacuate the lines, ammunition dumps are ruined and so is any heavy armor supporting the troops there. Russia is so busy rescuing the troops that survived that they're ignoring the civilians, again a PR blunder.
Fifth, Crimea will now be without water, meaning it is going to be difficult for Russia to hold it, they'll be too busy trucking in drinking water to do much else, and as more supply lines are cut, that water will have to come in by ship. Good luck there, fellas. Oh, and don't count on the Kerch bridge, the concrete pylons are failing
Because of all of this, I'm still unconvinced that the Russians blew up the dam. Uninspected and unmaintained hydroelectric turbines are even worse than bombs and a catastrophic failure of one of the turbines could have done this.
While it's remotely possible that they did blow it up, it will enter the history books as one of the greatest military blunders of all time.