if anything i think it will be an entire new class of more mathematically based privacy tools. right now monero is a glorified mixer, because up until a year or so ago there wasnt even a better way of making private transactions. then they added confidential-transactions, meaning even the values were hidden, but it's still based on every transaction being "mixed" with 6 or more other inputs. including fake ones.
zero-knowledge proofs are the first major improvement on mixing based privacy, but right now they're just not ready, and require too many magic values and trust to get working, but we're seeing good research in that space to remove that required trust.
but eventually we are going to need a more mathematical way to create private transactions, because while monero's way is the best we have today, it's very resource demanding, both on size and resources required to scan the blockchain for outputs. and the real issue is just like bitcoin isn't going to be able to add privacy to their base layer easily, when we move away from mixer based privacy monero is going to have an equally hard time keeping up.