Who's next?
In terms of wallets, I suspect it will be ones owned by other malicious entities such as centralized exchanges. Coinbase wallet, or Trust wallet which is owned by Binance. Those are already terrible wallets, but when they start attacking bitcoin itself as Wasabi does then that becomes yet another reason not to use them.
You're right, but I believe that state-actors will try to enforce that ALL wallet app developers should have such a feature to "protect" the Bitcoin users from receiving "sanctionable" outputs, or face the consequences.
The cowards like Wasabi will comply.

There are probably some services right now that will lock their users' accounts on account of "taint".
Almost all centralized exchanges will do this. Some will even lock your coins if you deposit coins from a Wasabi coinjoin, which makes a complete mockery of Wasabi's pro-government and pro-surveillance stance.
Like what I said in many posts in this topic. zkSNACKS' decision to filter transactions was truly never for the benefit of its users. It was made for the benefit of its own protection from government harrasment.