You know, I'm actually looking forward to the day that we can break existing cryptography. There's a lot of devices that are consumer unfriendly due to their security. Most famously, video game consoles. If we could break their security, it would open them wide to running custom code without tricky hacks that are inaccessible to the average end user. It would also allow enthusiast devs to release new games on disc and have them just boot on an unmodified console. This is something that happens already on older retro consoles like the NES where there security has already been broken.
I saw that NIST was considering a new breed of post-quantum PKI functions. Which would you recommend to use, if we wanted to make quantum resistant private key signing and encryption today?