A cruiser got damaged/sunk? During a war?! Whoa, better get this shit to the media, The public need to know about this!
Seriously, why are people treating this as a gotcha moment for Russia?
Funny you should say that, the last time a cruiser was sunk during a war was in 1982 during the Falklands War, and the headline that covered the papers was this:
Needless to say, the sinking of a cruiser, the flagship of the fleet no less, is a big deal. While it is obviously not in and of itself decisive for the ground war, it does expose serious vulnerability in the Russian Navy to have such an important vessel, one specialised in AA cover as missile cruisers are, destroyed by anti-ship missiles.
That will naturally have an impact on how the navy is deployed while supporting operations - specifically, it will force the Russians to be a LOT more cautious in committing warships to such operations. And that greatly limits what Russia can do in the southern theatre; I would say amphibious assaults are a no-go now.
Furthermore, it once again shows us that Ukraine is a lot more militarily capable than we'd previously assumed, at least compared with Russia. Had an American capital ship been sunk by Iraqi forces during the Gulf War or the 2003 invasion you can damn well bet people would've made a big deal of it.
As it happens Iraq DID fire Silkworm missiles at a US Navy Iowa class battleship in the Gulf War, but those missiles were shot down and destroyed by CIWS on a British destroyer providing air cover.