Signal has announced that it upgraded its end-to-end communication protocol to use quantum-resistant encryption keys to protect users from future attacks.
Quantum computers are real. You can get some on Amazon, no joke. People think it is only a matter of time before they are big enough to tackle the real world encryption.
It is extra worrying that once they are ready, they break encryption used today if someone happens to have stored some encrypted, assumed to be safe, traffic.
So better encryption now should resist breaking for years, as long as the information is relevant. And better protocols are needed now.